HIV mutates readily, leading to many different strains of HIV, even within the body of a single infected person.Based on genetic similarities, the numerous viral strains may be classified into types, groups, and subtypes.The other three groups are quite uncommon and only occur in Cameroon, Gabon, and Equatorial Guinea T-cells are lymphocytes essential for the functioning of the immune system in fighting infection.
On this page, find estimates on prevalence from: Youth Risk Behavior Survey, a nationally representative annual survey of youth in grades 9 to 12, found that, of those students who dated someone in the last 12 months, approximately one in 10 reported being a victim of physical violence from a romantic partner during that year.The National Longitudinal Study of Adolescent Health, analyzing a nationally representative sample of adolescents in grades 7 to 12 who were then followed over time, showed that approximately 30 percent of people ages 12 to 21 in heterosexual relationships reported experiencing psychological abuse in the past 18 months; 20 percent of youth in same-sex relationships reported experiencing the same type of abuse.About 10 percent of students in the Youth Risk Behavior Study who had dated someone in the last 12 months reported that they had been kissed, touched or physically forced to have sexual intercourse against their will by a dating partner during that year.To date, there are no nationally representative data on perpetration of dating violence.
This process continues until the immune system is badly compromised .
Acute HIV infection stage is the time period immediately following infection with the virus.
Medical treatment is available to delay the onset of AIDS. To infect someone, the human immunodeficiency virus must enter the bloodstream.
The virus causes an immune deficiency, and the body cannot defend against infection and disease.