http://aids.gov/hiv-aids-basics/hiv-aids-101/aids-timeline/
Reagan has been criticized for his complete non-response to AIDS as well. He mentioned it in passing in 1985, and didn't actually address the issue until 1987. Since AIDS mostly affected homosexuals and drug users, AIDS wasn't exactly a high priority for the Reagan administration in light of the Religious Right's massive power at the time. The popular rhetoric of the era was more akin to "AIDS is God's punishment for homosexuality" than compassion.
http://www.nytimes.com/2004/06/09/politics/09policy.html
To quote Reagan's biographer: "Reagan's response to this epidemic was halting and ineffective."