Cousin(noun) one collaterally related more remotely than a brother or sister; especially, the son or daughter of an uncle or aunt. Cousin(noun) a title formerly given by a king to a nobleman, particularly to those of the council. In English writs, etc., issued by the crown, it signifies any earl.
Since reports of the human immunodeficiency virus (HIV) virus began to emerge in the United States in the 1980s, the HIV epidemic has frequently been linked to gay, bisexual, and other men who have sex with men (MSM) by epidemiologists and medical professionals.en who have sex with men (abbreviated as MSM, also known as males who have sex with males) are male persons who engage in sexual activity with members of the same sex, regardless of how they personally identify themselves.
The HIV virus infects cells with CD4 surface proteins, and as a result, depletes the number of immune system cells (T cells, B cells, natural killer cells, monocytes) in the individual's blood. Most of the damage to an AIDS patient's immune system is done by the virus' destruction of CD4+ lymphocytes.IDS is the advanced form of infection with HIV virus. This virus may not cause recognizable symptoms for a long period after the initial exposure (latent period). As of early 2009, no vaccine was available to prevent HIV infection.