There wasn't an exemption for that.
You could make a religious exemption request out of that without any trouble at all.
“What if they just didn’t want it because it was experimental and long-term effects weren’t known?”
That a good reason for not wanting it. There is no exception for it.
I cant believe people think it’s easy to sidestep that with som random excuse
Many of them knew of the wonderful anthrax jab.
https://search.brave.com/search?q=anthrax+vaccine+long+term+side+effects+va&source=web