coup d'Ã©tat. a sudden and decisive action in politics, especially one resulting in a change of government illegally or by force. Origin of coup d'Ã©tat.
The human immunodeficiency virus (HIV) is a lentivirus (a subgroup of retrovirus) that causes HIV infection and acquired immunodeficiency syndrome (AIDS).AIDS is a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive.he human immunodeficiency virus (HIV) is a lentivirus (a subgroup of retrovirus) that causes HIV infection and acquired immunodeficiency syndrome (AIDS).
HIV: Early signs and symptoms. HIV is a virus that attacks a person's immune system. It can weaken the immune system to the point where a person's body struggles to fight infections and disease. If left untreated, HIV can lead to the disease AIDS. AIDS stands for acquired immunodeficiency syndrome. AIDS is the final stage of HIV infection.