Scientific Mask Study: "Masks mitigate the virus transmission by an order of magnitude -- 10 times less"

[NoleATL]

Can't wait to hear from the science isn't science crowd...

Masks block 99.9% of large Covid-linked droplets: study

Face masks reduce the risk of spreading large Covid-linked droplets when speaking or coughing by up to 99.9 percent, according to a lab experiment with mechanical mannequins and human subjects, researchers said Wednesday.

news.yahoo.com

 

[IACub]

Any intelligent person has understood this since well before Covid-19.

 

[Fluffles]

I’m going to withhold judgment until I see some more peer reviewed Facebook memes, shared by my crazy uncle.

 

[TailgateTom]

I’m going to withhold judgment until I see some more peer reviewed Facebook memes, shared by my crazy uncle.

Or your classmate who barely passed high school who’s “not a sheep”.

 

[hawkedoff]

How about this science? Does it count or does it not have the right level of political correctness? Guy seems like a real hack.

COMMENTARY: Masks-for-all for COVID-19 not based on sound data

www.cidrap.umn.edu

Of course there is also the study out of Denmark last month that said masks don't.likely do anything but who the hell like the danes anyway?

 

[tarheelbybirth]

How about this science? Does it count or does it not have the right level of political correctness? Guy seems like a real hack.

COMMENTARY: Masks-for-all for COVID-19 not based on sound data

www.cidrap.umn.edu

Of course there is also the study out of Denmark last month that said masks don't.likely do anything but who the hell like the danes anyway?

So you posted an op-ed saying we have no data and referenced a Danish study that doesn't say AT ALL what you claimed. The level of stupidity displayed would be breath-taking...but it's you so....not really.

 

[ConvenientParking]

How about this science? Does it count or does it not have the right level of political correctness? Guy seems like a real hack.

COMMENTARY: Masks-for-all for COVID-19 not based on sound data

www.cidrap.umn.edu

Of course there is also the study out of Denmark last month that said masks don't.likely do anything but who the hell like the danes anyway?

This is why you're supposed to stop reading everything out loud at some point before puberty.

 

[hawkedoff]

So you posted an op-ed saying we have no data and referenced a Danish study that doesn't say AT ALL what you claimed. The level of stupidity displayed would be breath-taking...but it's you so....not really.

I guess the hack that wrote the article and had it posted to the University of Minnesota hospital is stupid as well right? You probably didn't make it to the footnotes did you.

Keep that partisan hack thing going form yourself.

 

[hawkedoff]

This is why you're supposed to stop reading everything out loud at some point before puberty.

You should give it a try. Like actually reading what the expert in respiratory illnesses has to say about masks in the linked article.

 

[NoleATL]

How about this science? Does it count or does it not have the right level of political correctness? Guy seems like a real hack.

COMMENTARY: Masks-for-all for COVID-19 not based on sound data

www.cidrap.umn.edu

Of course there is also the study out of Denmark last month that said masks don't.likely do anything but who the hell like the danes anyway?

And we wonder why so many people fall for Trumps scam...

 

[WadeLookingbill]

I guess the hack that wrote the article and had it posted to the University of Minnesota hospital is stupid as well right? You probably didn't make it to the footnotes did you.

Keep that partisan hack thing going form yourself.

But seriously, even if there were equal amounts of conflicting evidence/studies, why wouldn't you err on the side of caution and just wear a mask? You literally could save a life, maybe even yours if you're into the selfish thing, and could help get the country back to normal. It's truly mind-bottling.

 

[ConvenientParking]

You should give it a try. Like actually reading what the expert in respiratory illnesses has to say about masks in the linked article.

I did, but should I have? It's dated for 4/1. Is there anything more recent?

 

[BioHawk]

I guess the hack that wrote the article and had it posted to the University of Minnesota hospital is stupid as well right? You probably didn't make it to the footnotes did you.

Keep that partisan hack thing going form yourself.

You don't seem to understand what "peer reviewed" means.

 

[OrlandNole]

How about this science? Does it count or does it not have the right level of political correctness? Guy seems like a real hack.

COMMENTARY: Masks-for-all for COVID-19 not based on sound data

www.cidrap.umn.edu

Of course there is also the study out of Denmark last month that said masks don't.likely do anything but who the hell like the danes anyway?

This is why we can't have nice things. Congrats.

 

[hawkedoff]

The brainwashing with you people is truly stunning. Science when it suits you. This is the reference list for the article published by the expert in respiratory illnesses and transmission that is linked on the University of Minnesota hospital website. Hey BIo....I guess all those experts probably don't know why peer reviewed means either....Im sure you can track down their information and give them your definition.

And I wear masks everywhere but the bullshit you people shovel about science and control you seek from that altar is ridiculous


References
Lee KW, Liu BYH. On the minimum efficiency and the most penetrating particle size for fibrous filters. J Air Pollut Control Assoc 1980 Mar 13;30(4):377-81
Martin SB Jr, Moyer ES. Electrostatic respirator filter media: filter efficiency and most penetrating particle size effects. Appl Occup Environ Hyg 2000 Nov 30;15(8):609-17
Reusability of facemasks during an influenza pandemic.News conference, Apr 27, 2006
Rengasamy S, Eimer B, Shaffer RE. Simple respiratory protection—evaluation of the filtration performance of cloth masks and common fabric materials against 20-1000 nm size particles.Ann Occup Hyg 2010 Jun 28;54(7):789-98
Jung H, Kim J, Lee S, et al. Comparison of filtration efficiency and pressure drop in anti-yellow sand masks, quarantine masks, medical masks, general masks, and handkerchiefs.Aerosol Air Qual Res 2014;14(14):991-1002.
Grinshpun SA, Haruta H, Eninger RM, et al. Performance of an N95 filtering facepiece particulate respirator and a surgical mask during human breathing: two pathways for particle penetration. J Occup Environ Hyg 2009 Jul 22;6(10):593-603
Oberg T, Brosseau LM. Surgical mask filter and fit performance. Am J Infect Control 2008 May;36(4):276-82
Willeke K, Qian Y, Donnelly J, et al. Penetration of airborne microorganisms through a surgical mask and a dust/mist respirator. Am Ind Hyg Assoc J 1996;57(4):348-55
Brosseau LM, McCullough NV, Vesley D. Mycobacterial aerosol collection efficiency of respirator and surgical mask filters under varying conditions of flow and humidity. Appl Occup Environ Hyg 1997;12(6):435-45
Chen CC, Willeke K. Aerosol penetration through surgical masks. Am J Infect Control 1992 Aug;20(4):177-84
McCullough NV, Brosseau LM, Vesley D. Collection of three bacterial aerosols by respirator and surgical mask filters under varying conditions of flow and relative humidity. Ann Occup Hyg 1997 Dec;41(6):677-90
Rengasamy S, Eimer B, Szalajda J. A quantitative assessment of the total inward leakage of NaCl aerosol representing submicron-size bioaerosol through N95 filtering facepiece respirators and surgical masks. J Occup Environ Hyg 2014 11(6):388-96
Davies A, Thompson KA, Giri K, et al. Testing the efficacy of homemade masks: would they protect in an influenza pandemic?Disaster Med Public Health Prep 2013 Aug;7(4):413-8
Cherrie JW, Apsley A, Cowie H, et al. Effectiveness of face masks used to protect Beijing residents against particulate air pollution.Occup Environ Med 2018 Jun;75(6):446-52
Mueller W, Horwell CJ, Apsley A, et al. The effectiveness of respiratory protection worn by communities to protect from volcanic ash inhalation. Part I: filtration efficiency tests.Int J Hyg Environ Health 2018 July;221(6):967-76
Bowen LE. Does that face mask really protect you?Appl Biosaf 2010 Jun 1;15(2):67-71
Shakya KM, Noyes A, Kallin R, et al. Evaluating the efficacy of cloth facemasks in reducing particulate matter exposure.J Expo Sci Environ Epidemiol 2017 May;27(3):352-7
van der Sande M., Teunis P, Sabel R. Professional and home-made face masks reduce exposure to respiratory infections among the general population. PLOS One 2008 Jul 9;3(7):0002618
Derrick JL, Gomersall CD. Protecting healthcare staff from severe acute respiratory syndrome: filtration capacity of multiple surgical masks. J Hosp Infect 2005 Apr;59(4):365-8
Chughtai AA, Seale H, MacIntyre CR. Use of cloth masks in the practice of infection control—evidence and policy gaps. Int J Infect Control 2013 Jun;9(3)
Kellogg WH, MacMillan G. An experimental study of the efficacy of gauze face masks.Am J Public Health 1920;10(1):34-42
Saunders-Hastings P, Crispo JA, Sikora L, et al. Effectiveness of personal protective measures in reducing pandemic influenza transmission: A systematic review and meta-analysis.Epidemics 2017 Sep;20:1-20
Cowling B J, Zhou Y, Ip DKM, et al. Face masks to prevent transmission of influenza virus: a systematic review. Epidemiol Infect 2010 Jan 22;138(4):449-56
Canini L, Andreoletti L, Ferrari P, et al. Surgical mask to prevent influenza transmission in households: a cluster randomized trial. PLOS One 2010 Nov 17;5(11):e13998
MacIntyre CR, Zhang Y, Chughtai AA, et al. Cluster randomised controlled trial to examine medical mask use as source control for people with respiratory illness.BMJ Open 2016 Dec 30;6(12):e012330
Meleny FL. Infection in clean operative wounds: a nine year study. Surg Gynecol Obstet 1935;60:264-75
Orr NWM. Is a mask necessary in the operating theater? Ann R Coll Surg Engl 1981;63:390-2
Mitchell NJ, Hunt S. Surgical face masks in modern operating rooms—a costly and unnecessary ritual? J Hosp Infect 1991;18(3):239-42
Tunevall TG. Postoperative wound infections and surgical face masks: a controlled study. World J Surg 1991 May-Jun;15(3):383-7
Belkin NL. Masks, barriers, laundering, and gloving: Where is the evidence?AORN J 2006 Oct 25;84(4):655-63
Johnson DF, Druce JD, Birch C, et al. A quantitative assessment of the efficacy of surgical and N95 masks to filter influenza virus in patients with acute influenza infection.Clin Infect Dis 2009 Jul 15;49(2):275-7
Driessche KV, Hens N, Tilley P, et al. Surgical masks reduce airborne spread of Pseudomonas aeruginosa in colonized patients with cystic fibrosis.Am J Respir Crit Care Med 2015 Oct 1;192(7):897-9
Milton DK, Fabian MP, Cowling BJ, et al. Influenza virus aerosols in human exhaled breath: particle size, culturability, and effect of surgical masks.PLoS Pathog 2013 Mar;9(3):e1003205
Stockwell RE, Wood ME, He C, et al. Face masks reduce the release of Pseudomonas aeruginosa cough aerosols when worn for clinically relevant periods.Am J Respir Crit Care Med 2018 Nov 15;198(10):1339-42
Hui DS, Chow BK, Chu L, et al. Exhaled air dispersion during coughing with and without wearing a surgical or N95 mask.PloS One 2012;7(12)e50845
Dharmadhikari AS, Mphahlele M, Stoltz A, et al. Surgical face masks worn by patients with multidrug-resistant tuberculosis: impact on infectivity of air on a hospital ward.Am J Respir Crit Care Med 2012 May 15;185(10):1104-9
Sung AD, Sung JA, Thomas S, et al. Universal mask usage for reduction of respiratory viral infections after stem cell transplant: a prospective trial.Clin Infect Dis 2016 Oct 15;63(8):999-1006
MacIntyre CR, Seale H, Dung TC, et al. A cluster randomised trial of cloth masks compared with medical masks in healthcare workers.BMJ Open 2015 Apr 22;5(4):e006577
Loeb M, Dafoe N, Mahony J, et al. Surgical mask vs N95 respirator for preventing influenza among healthcare workers: a randomized trial. JAMA 2009 Nov 4;302(17):1865-71
MacIntyre CR, Wang Q, Cauchemez S, et al. A cluster randomized clinical trial comparing fit‐tested and non‐fit‐tested N95 respirators to medical masks to prevent respiratory virus infection in health care workers. Influenza Other Respir Viruses 2011;5(3):170-9
MacIntyre CR, Wang Q, Rahman B, et al. Efficacy of face masks and respirators in preventing upper respiratory tract bacterial colonization and co-infection in hospital healthcare workers—authors' reply. Prev Med 2014 Aug;65:154
MacIntyre CR, Wang Q, Seale H, et al. A randomized clinical trial of three options for N95 respirators and medical masks in health workers. Am J Resp Crit Care Med 2013;187(9):960-6
Radonovich LJ, Simberkoff MS, Bessesen MT, et al. N95 respirators vs medical masks for preventing influenza among health care personnel: a randomized clinical trial. JAMA 2019 Sep 3;322(9):824-33
Gralton J, and McLaws ML. Protecting healthcare workers from pandemic influenza: N95 or surgical masks?. Crit Care Med 2010 Feb;38(2):657-67
bin‐Reza F, Chavarrias VL, Nicoll A, et al. The use of masks and respirators to prevent transmission of influenza: a systematic review of the scientific evidence. Influenza Other Respir Virus 2012 Jul;6(4):257-67
Bunyan D, Ritchie L, Jenkins D, et al. Respiratory and facial protection: a critical review of recent literature. J Hosp Infect 2013 Nov;85(3):165-9
Smith JD, MacDougall CC, Johnstone J, et al. Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis. CMAJ 2016 May 17;188(8):567-74
Jefferson T, Jones M, Ansari LAA, et al. Physical interventions to interrupt or reduce the spread of respiratory viruses. Part 1 - Face masks, eye protection and person distancing: systematic review and meta-analysis. medRxiv 2020 Mar 30
Offeddu V, Yung CF, Low MSF, et al. Effectiveness of masks and respirators against respiratory infections in healthcare workers: a systematic review and meta-analysis. Clin Infect Dis 2017 Aug 7;65(11):1934-42
Long Y, Hu T, Liu L, et al. Effectiveness of N95 respirators versus surgical masks against influenza: A systematic review and meta‐analysis. J Evid Based Med 2020 (published online Mar 13)
MacIntyre CR, Chughtai AA, Rahman B, et al. The efficacy of medical masks and respirators against respiratory infection in healthcare workers. Influenza Other Respir Viruses 2017;11(6):511-7
Loeb M, McGeer A, Henry B, et al. SARS among critical care nurses, Toronto.Emerg Infect Dis 2004 Feb;10(2):251-5

 

[tarheelbybirth]

I guess the hack that wrote the article and had it posted to the University of Minnesota hospital is stupid as well right? You probably didn't make it to the footnotes did you.

Keep that partisan hack thing going form yourself.

You mean the op-ed that says this:

"...we support mask wearing by the general public..."

The stupidity is yours for thinking the op-ed supports whatever idiotic point you think you're making - and for thinking I questioned the intelligence or even the opinion expressed by the author.

 

[What Would Jesus Do?]

The brainwashing with you people is truly stunning. Science when it suits you. This is the reference list for the article published by the expert in respiratory illnesses and transmission that is linked on the University of Minnesota hospital website. Hey BIo....I guess all those experts probably don't know why peer reviewed means either....Im sure you can track down their information and give them your definition.

And I wear masks everywhere but the bullshit you people shovel about science and control you seek from that altar is ridiculous

I don't get your point.

If we are talking and - unknown to either of us - I am infected and shedding, would you rather I be wearing some sort of face covering or not?

You say you wear masks, so I assume you'd rather I be wearing one, too.

Again, what's your point in posting articles like this?

 

[shank hawk]

 

[FlickShagwell]

Or your classmate who barely passed high school who’s “not a sheep”.

The craziest dumbest people I know have at one time or another expressed that same “I’m not a sheep” sentiment.

Probably just a coincidence, I’m sure.

 

[Rudolph]

America is stunningly dumb.

 

[dgordo]

The brainwashing with you people is truly stunning. Science when it suits you. This is the reference list for the article published by the expert in respiratory illnesses and transmission that is linked on the University of Minnesota hospital website. Hey BIo....I guess all those experts probably don't know why peer reviewed means either....Im sure you can track down their information and give them your definition.

And I wear masks everywhere but the bullshit you people shovel about science and control you seek from that altar is ridiculous


References
Lee KW, Liu BYH. On the minimum efficiency and the most penetrating particle size for fibrous filters. J Air Pollut Control Assoc 1980 Mar 13;30(4):377-81
Martin SB Jr, Moyer ES. Electrostatic respirator filter media: filter efficiency and most penetrating particle size effects. Appl Occup Environ Hyg 2000 Nov 30;15(8):609-17
Reusability of facemasks during an influenza pandemic.News conference, Apr 27, 2006
Rengasamy S, Eimer B, Shaffer RE. Simple respiratory protection—evaluation of the filtration performance of cloth masks and common fabric materials against 20-1000 nm size particles.Ann Occup Hyg 2010 Jun 28;54(7):789-98
Jung H, Kim J, Lee S, et al. Comparison of filtration efficiency and pressure drop in anti-yellow sand masks, quarantine masks, medical masks, general masks, and handkerchiefs.Aerosol Air Qual Res 2014;14(14):991-1002.
Grinshpun SA, Haruta H, Eninger RM, et al. Performance of an N95 filtering facepiece particulate respirator and a surgical mask during human breathing: two pathways for particle penetration. J Occup Environ Hyg 2009 Jul 22;6(10):593-603
Oberg T, Brosseau LM. Surgical mask filter and fit performance. Am J Infect Control 2008 May;36(4):276-82
Willeke K, Qian Y, Donnelly J, et al. Penetration of airborne microorganisms through a surgical mask and a dust/mist respirator. Am Ind Hyg Assoc J 1996;57(4):348-55
Brosseau LM, McCullough NV, Vesley D. Mycobacterial aerosol collection efficiency of respirator and surgical mask filters under varying conditions of flow and humidity. Appl Occup Environ Hyg 1997;12(6):435-45
Chen CC, Willeke K. Aerosol penetration through surgical masks. Am J Infect Control 1992 Aug;20(4):177-84
McCullough NV, Brosseau LM, Vesley D. Collection of three bacterial aerosols by respirator and surgical mask filters under varying conditions of flow and relative humidity. Ann Occup Hyg 1997 Dec;41(6):677-90
Rengasamy S, Eimer B, Szalajda J. A quantitative assessment of the total inward leakage of NaCl aerosol representing submicron-size bioaerosol through N95 filtering facepiece respirators and surgical masks. J Occup Environ Hyg 2014 11(6):388-96
Davies A, Thompson KA, Giri K, et al. Testing the efficacy of homemade masks: would they protect in an influenza pandemic?Disaster Med Public Health Prep 2013 Aug;7(4):413-8
Cherrie JW, Apsley A, Cowie H, et al. Effectiveness of face masks used to protect Beijing residents against particulate air pollution.Occup Environ Med 2018 Jun;75(6):446-52
Mueller W, Horwell CJ, Apsley A, et al. The effectiveness of respiratory protection worn by communities to protect from volcanic ash inhalation. Part I: filtration efficiency tests.Int J Hyg Environ Health 2018 July;221(6):967-76
Bowen LE. Does that face mask really protect you?Appl Biosaf 2010 Jun 1;15(2):67-71
Shakya KM, Noyes A, Kallin R, et al. Evaluating the efficacy of cloth facemasks in reducing particulate matter exposure.J Expo Sci Environ Epidemiol 2017 May;27(3):352-7
van der Sande M., Teunis P, Sabel R. Professional and home-made face masks reduce exposure to respiratory infections among the general population. PLOS One 2008 Jul 9;3(7):0002618
Derrick JL, Gomersall CD. Protecting healthcare staff from severe acute respiratory syndrome: filtration capacity of multiple surgical masks. J Hosp Infect 2005 Apr;59(4):365-8
Chughtai AA, Seale H, MacIntyre CR. Use of cloth masks in the practice of infection control—evidence and policy gaps. Int J Infect Control 2013 Jun;9(3)
Kellogg WH, MacMillan G. An experimental study of the efficacy of gauze face masks.Am J Public Health 1920;10(1):34-42
Saunders-Hastings P, Crispo JA, Sikora L, et al. Effectiveness of personal protective measures in reducing pandemic influenza transmission: A systematic review and meta-analysis.Epidemics 2017 Sep;20:1-20
Cowling B J, Zhou Y, Ip DKM, et al. Face masks to prevent transmission of influenza virus: a systematic review. Epidemiol Infect 2010 Jan 22;138(4):449-56
Canini L, Andreoletti L, Ferrari P, et al. Surgical mask to prevent influenza transmission in households: a cluster randomized trial. PLOS One 2010 Nov 17;5(11):e13998
MacIntyre CR, Zhang Y, Chughtai AA, et al. Cluster randomised controlled trial to examine medical mask use as source control for people with respiratory illness.BMJ Open 2016 Dec 30;6(12):e012330
Meleny FL. Infection in clean operative wounds: a nine year study. Surg Gynecol Obstet 1935;60:264-75
Orr NWM. Is a mask necessary in the operating theater? Ann R Coll Surg Engl 1981;63:390-2
Mitchell NJ, Hunt S. Surgical face masks in modern operating rooms—a costly and unnecessary ritual? J Hosp Infect 1991;18(3):239-42
Tunevall TG. Postoperative wound infections and surgical face masks: a controlled study. World J Surg 1991 May-Jun;15(3):383-7
Belkin NL. Masks, barriers, laundering, and gloving: Where is the evidence?AORN J 2006 Oct 25;84(4):655-63
Johnson DF, Druce JD, Birch C, et al. A quantitative assessment of the efficacy of surgical and N95 masks to filter influenza virus in patients with acute influenza infection.Clin Infect Dis 2009 Jul 15;49(2):275-7
Driessche KV, Hens N, Tilley P, et al. Surgical masks reduce airborne spread of Pseudomonas aeruginosa in colonized patients with cystic fibrosis.Am J Respir Crit Care Med 2015 Oct 1;192(7):897-9
Milton DK, Fabian MP, Cowling BJ, et al. Influenza virus aerosols in human exhaled breath: particle size, culturability, and effect of surgical masks.PLoS Pathog 2013 Mar;9(3):e1003205
Stockwell RE, Wood ME, He C, et al. Face masks reduce the release of Pseudomonas aeruginosa cough aerosols when worn for clinically relevant periods.Am J Respir Crit Care Med 2018 Nov 15;198(10):1339-42
Hui DS, Chow BK, Chu L, et al. Exhaled air dispersion during coughing with and without wearing a surgical or N95 mask.PloS One 2012;7(12)e50845
Dharmadhikari AS, Mphahlele M, Stoltz A, et al. Surgical face masks worn by patients with multidrug-resistant tuberculosis: impact on infectivity of air on a hospital ward.Am J Respir Crit Care Med 2012 May 15;185(10):1104-9
Sung AD, Sung JA, Thomas S, et al. Universal mask usage for reduction of respiratory viral infections after stem cell transplant: a prospective trial.Clin Infect Dis 2016 Oct 15;63(8):999-1006
MacIntyre CR, Seale H, Dung TC, et al. A cluster randomised trial of cloth masks compared with medical masks in healthcare workers.BMJ Open 2015 Apr 22;5(4):e006577
Loeb M, Dafoe N, Mahony J, et al. Surgical mask vs N95 respirator for preventing influenza among healthcare workers: a randomized trial. JAMA 2009 Nov 4;302(17):1865-71
MacIntyre CR, Wang Q, Cauchemez S, et al. A cluster randomized clinical trial comparing fit‐tested and non‐fit‐tested N95 respirators to medical masks to prevent respiratory virus infection in health care workers. Influenza Other Respir Viruses 2011;5(3):170-9
MacIntyre CR, Wang Q, Rahman B, et al. Efficacy of face masks and respirators in preventing upper respiratory tract bacterial colonization and co-infection in hospital healthcare workers—authors' reply. Prev Med 2014 Aug;65:154
MacIntyre CR, Wang Q, Seale H, et al. A randomized clinical trial of three options for N95 respirators and medical masks in health workers. Am J Resp Crit Care Med 2013;187(9):960-6
Radonovich LJ, Simberkoff MS, Bessesen MT, et al. N95 respirators vs medical masks for preventing influenza among health care personnel: a randomized clinical trial. JAMA 2019 Sep 3;322(9):824-33
Gralton J, and McLaws ML. Protecting healthcare workers from pandemic influenza: N95 or surgical masks?. Crit Care Med 2010 Feb;38(2):657-67
bin‐Reza F, Chavarrias VL, Nicoll A, et al. The use of masks and respirators to prevent transmission of influenza: a systematic review of the scientific evidence. Influenza Other Respir Virus 2012 Jul;6(4):257-67
Bunyan D, Ritchie L, Jenkins D, et al. Respiratory and facial protection: a critical review of recent literature. J Hosp Infect 2013 Nov;85(3):165-9
Smith JD, MacDougall CC, Johnstone J, et al. Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis. CMAJ 2016 May 17;188(8):567-74
Jefferson T, Jones M, Ansari LAA, et al. Physical interventions to interrupt or reduce the spread of respiratory viruses. Part 1 - Face masks, eye protection and person distancing: systematic review and meta-analysis. medRxiv 2020 Mar 30
Offeddu V, Yung CF, Low MSF, et al. Effectiveness of masks and respirators against respiratory infections in healthcare workers: a systematic review and meta-analysis. Clin Infect Dis 2017 Aug 7;65(11):1934-42
Long Y, Hu T, Liu L, et al. Effectiveness of N95 respirators versus surgical masks against influenza: A systematic review and meta‐analysis. J Evid Based Med 2020 (published online Mar 13)
MacIntyre CR, Chughtai AA, Rahman B, et al. The efficacy of medical masks and respirators against respiratory infection in healthcare workers. Influenza Other Respir Viruses 2017;11(6):511-7
Loeb M, McGeer A, Henry B, et al. SARS among critical care nurses, Toronto.Emerg Infect Dis 2004 Feb;10(2):251-5

why do wear a mask if you dont believe they work?

 

[TailgateTom]

The craziest dumbest people I know have at one time or another expressed that same “I’m not a sheep” sentiment.

Probably just a coincidence, I’m sure.

YES!!!!! Same here, lmao!

 

[Ozzy4335]

View embedded media

You are a friggin hillbilliy. Seriously. A gigantic douche.

 

[Joes Place]

Of course there is also the study out of Denmark last month that said masks don't.likely do anything but who the hell like the danes anyway?

Not what the study says at all, but do post more "rando commentary" as you see fit. Others have posted the science.

 

[BioHawk]

The brainwashing with you people is truly stunning. Science when it suits you. This is the reference list for the article published by the expert in respiratory illnesses and transmission that is linked on the University of Minnesota hospital website. Hey BIo....I guess all those experts probably don't know why peer reviewed means either....Im sure you can track down their information and give them your definition.

And I wear masks everywhere but the bullshit you people shovel about science and control you seek from that altar is ridiculous


References

JFC, just because you reference sources doesn't mean your opinion paper is "peer reviewed". Peer reviewing involves getting your paper published in a respected professional journal. This is two people's opinion. The scientific consensus of hundreds of other researchers disagrees with this person. This is how science works. Not everyone agrees with everything. This persons opinion is relevent to the conversation, in fact it is important, but it is not the end all be all. It's why it is important that you listen to the research organizations because consensus has a far higher batting average than individuals do and should be what guides public policy. Individuals like this need to be part of the conversation within those organizations.

Also, you seem to have skipped over the first paragraph:

The authors and CIDRAP have received requests in recent weeks to remove this article from the CIDRAP website. Reasons have included: (1) we don’t truly know that cloth masks (face coverings) are not effective, since the data are so limited, (2) wearing a cloth mask or face covering is better than doing nothing, (3) the article is being used by individuals and groups to support non-mask wearing where mandated and (4) there are now many modeling studies suggesting that cloth masks or face coverings could be effective at flattening the curve and preventing many cases of infection.

They then further explain to give their response, which amounts to "There's very little evidence that this works (which I would have disagreed with in July when this was written but I would strongly disagree with now) so let's not do anything". The CDC's approach is, "We don't know how effective it is but we know not wearing a mask makes this thing spread like wildfire so the safest direction for public policy is to have people wear masks.

Again, these types of dissenting views are important, but this person ended up being wrong.

 

[Joes Place]

The brainwashing with you people is truly stunning. Science when it suits you. This is the reference list for the article published by the expert in respiratory illnesses and transmission that is linked on the University of Minnesota hospital website. Hey BIo....I guess all those experts probably don't know why peer reviewed means either....Im sure you can track down their information and give them your definition.

And I wear masks everywhere but the bullshit you people shovel about science and control you seek from that altar is ridiculous


References
Lee KW, Liu BYH. On the minimum efficiency and the most penetrating particle size for fibrous filters. J Air Pollut Control Assoc 1980 Mar 13;30(4):377-81
Martin SB Jr, Moyer ES. Electrostatic respirator filter media: filter efficiency and most penetrating particle size effects. Appl Occup Environ Hyg 2000 Nov 30;15(8):609-17
Reusability of facemasks during an influenza pandemic.News conference, Apr 27, 2006
Rengasamy S, Eimer B, Shaffer RE. Simple respiratory protection—evaluation of the filtration performance of cloth masks and common fabric materials against 20-1000 nm size particles.Ann Occup Hyg 2010 Jun 28;54(7):789-98
Jung H, Kim J, Lee S, et al. Comparison of filtration efficiency and pressure drop in anti-yellow sand masks, quarantine masks, medical masks, general masks, and handkerchiefs.Aerosol Air Qual Res 2014;14(14):991-1002.
Grinshpun SA, Haruta H, Eninger RM, et al. Performance of an N95 filtering facepiece particulate respirator and a surgical mask during human breathing: two pathways for particle penetration. J Occup Environ Hyg 2009 Jul 22;6(10):593-603
Oberg T, Brosseau LM. Surgical mask filter and fit performance. Am J Infect Control 2008 May;36(4):276-82
Willeke K, Qian Y, Donnelly J, et al. Penetration of airborne microorganisms through a surgical mask and a dust/mist respirator. Am Ind Hyg Assoc J 1996;57(4):348-55
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What's all this diarrhea?

Pick an article you think supports your point, and summarize it.
Be specific.

OP posted one that is quite clear. See if you are able to logically understand the fallacies in many of your posts here.

I'm going on record with $1000 you cannot do it.

 

[tarheelbybirth]

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You think the anti-maskers in NC are different from those in SC? Stupid people everywhere. Yet, you persist.

 

[Joes Place]

Again, these types of dissenting views are important, but this person ended up being wrong.

They just Google for things that are contrarian, and have literally no clue how relevant or accurate they are.

 

[dirtypool]

The craziest dumbest people I know have at one time or another expressed that same “I’m not a sheep” sentiment.

Probably just a coincidence, I’m sure.

 

[shank hawk]

You think the anti-maskers in NC are different from those in SC? Stupid people everywhere. Yet, you persist.

This thread brought to you by the fine scientific minds at Yahoo, who linked no study, and ended their click-bait with this laugher from the CDC: ‘cloth masks can effectively block the exhalation of aerosols’.

Yep. Stupid people everywhere.

 

[tarheelbybirth]

This thread brought to you by the fine scientific minds at Yahoo, who linked no study, and ended their click-bait with this laugher from the CDC: ‘cloth masks can effectively block the exhalation of aerosols’.

Yep. Stupid people everywhere.

And you most commonly sight one in your own mirror.

 

[Joes Place]

This thread brought to you by the fine scientific minds at Yahoo, who linked no study, and ended their click-bait with this laugher from the CDC: ‘cloth masks can effectively block the exhalation of aerosols’.

Yep. Stupid people everywhere.

Face Coverings and Respiratory Tract Droplet Dispersion

Respiratory droplets are the primary transmission route for SARS-CoV-2. Evidence suggests that virus transmission can be reduced by face coverings, but robust evidence for how mask usage might affect safe distancing parameters is lacking. Accordingly, we investigate the effectiveness of surgical...

www.medrxiv.org

https://www.medrxiv.org/content/10.1101/2020.08.11.20145086v1.full.pdf

 

[spiderland]

JFC, just because you reference sources doesn't mean your opinion paper is "peer reviewed". Peer reviewing involves getting your paper published in a respected professional journal. This is two people's opinion. The scientific consensus of hundreds of other researchers disagrees with this person. This is how science works. Not everyone agrees with everything. This persons opinion is relevent to the conversation, in fact it is important, but it is not the end all be all. It's why it is important that you listen to the research organizations because consensus has a far higher batting average than individuals do and should be what guides public policy. Individuals like this need to be part of the conversation within those organizations.

Also, you seem to have skipped over the first paragraph:



They then further explain to give their response, which amounts to "There's very little evidence that this works (which I would have disagreed with in July when this was written but I would strongly disagree with now) so let's not do anything". The CDC's approach is, "We don't know how effective it is but we know not wearing a mask makes this thing spread like wildfire so the safest direction for public policy is to have people wear masks.

Again, these types of dissenting views are important, but this person ended up being wrong.

I commend you for your efforts here. You’ve articulated the concept of “scientific consensus” exceptionally well, particularly in regards to this specific topic. I suspect, however, that given the audience you were attempting to persuade, you would likely have been more successful had you shared this with my cats instead...

 

[*33*]

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I mean if its on the internet its got to be true...how many sc metros dont have mask mandates?

America is stunningly dumb.

@shank hawk

 

[shank hawk]

 

[your_master5]

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The full unroll of that thread. Liberals be liberaling with their stupid mask mandates. They will only look at "their" peer reviewed studies and ignore the others or just simply ignore the actual data this guy provides that shows RESULTS of said masks. Speds.

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[SSG T]

The full unroll of that thread. Liberals be liberaling with their stupid mask mandates. They will only look at "their" peer reviewed studies and ignore the others or just simply ignore the actual data this guy provides that shows RESULTS of said masks. Speds.

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That guy's Twitter feed and web site are disasters. Why is all of his "data" behind a pay wall?

 

[BioHawk]

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Population is irrelevant. Population density is far more relevant. And how did they adjust for this?

 

[Hawk_82]

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This might be the smartest thing you have ever said and you probably didn't even realize it. A mask mandate is different than people wearing masks.

Just because there is a mandate doesn't mean there is compliance. So this issue right here is also the reason there is not peer reviewed research that masks work. It is very impractical to follow people around in public to track mask compliance. It is not very scientific to trust people when they say they have good mask compliance. See the problem?

 

[funksouljon]

We still have people trying to show that masks don't work, because of some op-ed, or some non relevant data comparison or some other nonsense.

This is why we have the worst numbers in the world. It why we can't have nice things. It's been 8 freaking months....