HIV is a human immunodeficiency virus.
This causes a disease, or we should say a collection of diseases called AIDS.
AIDS is a viral disease which could spread through any activity that includes blood transfusion or direct sexual contact.
AIDS is an STD how it spreads could include,
• Unprotected copulation
• Sharing of infectious needles
• Transfusion of blood between a normal and infected person
• It can also be transmitted from an infected mother to the fetus.