On Jul. 27, 1982, a meeting in Washington, DC, attended by federal officials, university researchers, community activists, and others. Since its original description 32 years ago, Human immunodeficiency virus (HIV) has become one of the most significant infectious diseases worldwide and has challenged public health systems in every country affected by the epidemic.

Acquired immunodeficiency syndrome (AIDS) occurs at the most advanced stage of infection. HIV targets the body’s white blood cells, weakening the immune system.