18 May is observed as a World AIDS Vaccine Day, (also known as HIV Vaccine Awareness Day), every year. The day promote the continued urgent need for a vaccine to prevent HIV infection and AIDS. The first World AIDS Vaccine Day was thus observed on 18th May in 1998, to commemorate the anniversary of Clinton’s speech.

The concept of World AIDS Vaccine Day was proposed on 18th May 1997, during a commencement speech at Morgan State University made by then-President Bill Clinton, which underlined the need for a vaccine to curb the spread of HIV.