This brief video clip presents an overview of HIV and AIDS.
It begins by explaining that infection by the human immunodeficiency virus does not always cause AIDS. However,
once HIV infection occurs and T-cell levels drop to dangerously low levels, AIDS can be the end result. AIDS is
also diagnosed when HIV-infected people suffer one or more of 26 opportunistic infections. These are illnesses,
such as Kaposi’s sarcoma and non-Hodgkin’s lymphoma, that don’t normally occur in most people but do show up in
AIDS patients.