The 1985 World Health Organization AIDS Surveillance Case Definition was a set of criteria established in 1985 to help doctors and health officials figure out if someone had AIDS (a very serious health problem caused by a virus called HIV). The criteria included things like having a certain number of symptoms or illnesses, or the virus being found in someone's blood. This definition helped doctors and health officials to more easily identify people who had AIDS, so they could be given the right treatments.