by Adrianna Lazaro February 28, 2015
by Adrianna Lazaro February 28, 2015
HIV (Human Immunodeficiency Virus) - any of several retroviruses and especially HIV-1 that infect and destroy helper T cells of the immune system causing the marked reduction in their numbers that is diagnostic of AIDS—called also AIDS virus, human immunodeficiency virus.
by Adrianna Lazaro February 27, 2015
by Adrianna Lazaro February 25, 2015