The Human Immunodeficiency Virus (HIV) belongs to a class of retrovirus. Once infected with HIV it multiplies and attacks the CD4 cells of the individual. Thereby damaging their immune system if not treated with an Antiretroviral regimen. The individual is vulnerable to Opportunistic Infections (OIs), such as Tuberculosis (TB), Forms of Pneumonia, Herpes Simplex Virus, or Lymphoma. A weakened immune system also leads to Acquired Immunodeficiency Syndrome (AIDS), once HIV goes untreated.
HIV is transmitted through condomless sex, blood interaction (occupational and non-occupational), and mother-to-child transmission (prenatal and postnatal).
HIV prevention can be Behavioral or Biomedical.