Leibidik Yankel, vaccines don’t have a 100% effective rate. I wouldn’t care about anti-vaxxers if they did.
But there’s something called herd immunity, which means that at least 95% of the population needs to be vaccinated for a disease to be eradicated.
I remember getting the flu shot last year and still getting the flu. That’s because it doesn’t work all the time. Yet I got it again this year because I’m not stupid. I know that just because it doesn’t work once doesn’t mean they don’t work.
The only people who should not be vaccinated are babies that are too young and people for whom it poses health risks. If you use Judaism for a “religious exemption”, you are turning it into a cult. Venishmartem Me’od Lenafshosechem.