If you are anti-vax, why?

I honestly am vaccinating my child, but I’m curious to see why someone might not want to. we know the autism research isn’t true, so what is your reason? I’m genuinely curious

Edit- guys I have an open mind. I don’t agree with anti vaxxers but I want to know if they have a valid reason that isn’t “it causes autism” it’s good to be open minded sometimes, calm down