Told you

Malaria resistance gene ups HIV risk (ABC News in Science)

This story reminded me of a conversation I had with a friend in the late 1980's, in which I said maybe HIV had taken hold strongly in parts of Africa because of a genetic susceptibility in the black population. I could not remember for sure at the time when or where I might have read the suggestion, but in any event, it seemed plausible.

My friend dismissed the idea, thinking it was too close to racist.

Years later, we fell out in circumstances in which I do have to take some blame. Now I feel potentially vindicated.

The moral of the story is: you should try hard to keep friends, if you want to be able to laughingly claim vindication 20 years later. Or something like that, anyway...