Last week, I discussed the rather odd (in a bad way) idea that mutants cannot contract AIDS (nor, naturally enough, HIV). I thought that the notion first appeared in Uncanny X-Men #427 by Chuck Austen, Steve Kim and a number of inkers. As it turns out, commenter Mikhail pointed out that Austen actually debuted the notion six issues earlier, in Uncanny X-Men #421 by Austen, Ron Garney and Mark Morales.
Read on to see how it was introduced!
So not only was the idea a poor one, but it was actually repeated twice in six issues!