HIV is the virus that causes AIDS. AIDS is a collection of medical conditions to which people who have HIV are vulnerable. A person can have HIV, but not AIDS.

HIV stands for human immunodeficiency virus. It attacks the immune system and weakens the body's ability to fight off infections. If left untreated, HIV can progress to AIDS, which is the final stage of the infection. AIDS is characterized by a severely weakened immune system and the presence of opportunistic infections and certain cancers.

It is important for individuals who are at risk of HIV to get tested regularly and seek treatment if they test positive. Early diagnosis and treatment can help people with HIV live long and healthy lives and reduce the risk of developing AIDS. Prevention methods, such as practicing safe sex and not sharing needles, are also important in reducing the spread of HIV.