There are more than hundred english-english dictionaries in the world. According to merriam-websters website: Webster's Third New International Dictionary, Unabridged, together with its 1993 Addenda Section, includes some 470,000 entries.
Most commonly, HIV infection is spread by having sex with an infected partner. The virus can enter the body through the lining of the vagina, vulva, penis, rectum, or mouth during sex. Although vaginal and anal intercourse are the primary risk factors, oral sex transmission is also possible.
HIV and AIDS. 1  AIDS is an immune deficiency condition caused by infection with the Human Immunodeficiency Virus (HIV) 2  Epidemiology HIV can occur in any population. increased prevalence in hemophiliacs, IV drug abusers, and homosexual men. 3  Pathophysiology the CD4 cells (T-helper cells) are affected.