Along the lines of classic zombie flicks, we have a mass vaccination program that goes wrong. But instead of generating flesh-eating zombies, we find that human females can no longer haver babies. Can artificial wombs save the human race? Anyway, the claim that the Covid-19 vaccine can make females infertile has been subject to criticism, so who knows?
https://globalnews.ca/news/7527995/coronavirus-vaccine-infertility-safety/