no.

steroids are a specific thing, and are not used in vaccines. steroids can’t cause autism even if that was the case. vaccines can not cause autism at all. vaccines work by incapacitating a viral or bacterial agent, sprinkling some red flag on it and dumping it in your system for the immune system to stumble across

autism is a developmental issue, either selected genes at conception mess with developmental plans, or something interrupts development before birth. vaccines do not have a chance to be administered before that period is over.

also!

GMO’s are a meaningless designation to determine harm in any regard. all it dictates is whether humans have in any fashion altered the organism. bananas are GMO not because we went mad with genetic code splicing, but because we artificially selected for maximizing the food portion and minimizing the seed output, and use cuttings from the result to grow the same plant over and over. you might as well have said “red foods can also be dangerously although not likely”

also,

there are people who do believe in flat earth, because otherwise their religion is false.