Is there any known pharmaceutical or chemical that could cause infertility in humans in a single dose with few or no other effects?
The context is that a number of claims are circulating about vaccination being a "cover" for a plot to render males and/or females infertile. I claimed that it is unlikely that there is a known way to make a person infertile with a single dose of a chemical without significant side effects. However I couldn't find a source.
I'm asking as I believe it is important to have scientifically accurate responses to rumors and the like, even if they are outlandish.