Here's how to maneuver through this interactive timeline of the science, politics, activism, cultural milestones and spread of the AIDS pandemic:

· Click on an event for more details

· To navigate by year: Use the arrow buttons to scroll through the years, or the pull-down menu to jump to a specific year
· To navigate by category: The timeline opens with all categories activated. To see only one, click off the other categories. (You'll know the categories are turned off when the tab at the top is greyed out.)