I just finished reading Gibson’s Virtual Light the other day, then I find this:

Up to six years after their initial HIV-infection, men whose blood contained the second virus - known simply as GB virus C (GBV-C) - were nearly three times less likely to die than HIV-positive men who did not have the secondary infection. Understanding how this virus protects against AIDS and death could suggest new ways to fight HIV infections…

Link (via Die Puny Humans)