Es wird aber schon an "Self-spreading vaccines" gearbeitet, ab da wird es richtig "lustig".
Self-spreading vaccines have some of their roots in efforts to reduce pest populations.
Australian researchers described a virally spread immunocontraception, which hijacked the immune systems of infected animals—
in this case a non-native mouse species in Australia—
and prevented them from fertilizing offspring.Hmm.
How bout two-legged pests?
Scientists Are Working on Vaccines that Spread Like a Disease. What Could Possibly Go Wrong?
https://archive.is/ajTvf
https://thebulletin.org/2020/09/scientists-are-working-on-vaccines-that-spread-like-a-disease-what-could-possibly-go-wrong/Self-spreading vaccines could indeed entail serious risks, and the prospect of using them raises challenging questions.
https://www.zodlikeproductions.net/t238p330-main-news-thread-conflicts-terrorism-crisis-from-around-the-globe#104194