Unsurprisingly, a number of LGBTQ web sites – Towleroad and Pink News among them – are reporting the death of Stephen Crohn, who took his own life at the age of 66.

Crohn became famous as the man who couldn’t catch AIDS because a genetic flaw meant he was immune to the virus. His willingness to work with researchers has helped scientists to gain a deeper understanding of how HIV can take hold in the body.

Sadly, his boyfriend Jerry Green was among the first to die as result of AIDS-related conditions, and – like most gay men of his generation – Stephen saw far too many of those he knew pass away for the same reasons.

His sister told the New York Times that he suffered from “survivor guilt”, something which will be familiar to many gay men of his age. Is it something you’ve felt? We’d like to know…