What is the earliest time to detect hiv in the blood?

HIV detection: Hiv is most commonly diagnosed by testing your blood or saliva for the presence of antibodies to the virus. Unfortunately, these types of HIV tests aren't accurate immediately after infection because it takes time for your body to develop these antibodies, usually up to 12 weeks. In rare cases, it can take up to six months for an HIV antibody test to become positive.Ask about the HIV antigen test.