Anti vaxxers are nutballs. Always have been.
The problem is, anti vaxxers didn't exist 25 years ago. Back then, enough people were still around to see what all those diseases did so they weren't stupid enough to think not having the vaccines was a good thing.
Now, no one has seen what measles, mumps, whooping cough, etc can do to a child. If they haven't seen it personally, it didn't happen. Just like Covid, it didn't happen to them, so it's a government conspiracy to control us. Because people are easily manipulated by disinformation.