Which statement about HIV presence in the bloodstream is true?

• A. It can be detected in blood before health problems appear
• B. It can be detected only after symptoms develop
• C. It is never present in the blood
• D. It is only transmitted by blood transfusions

Answer: (A)

HIV can be present in the bloodstream and detectable before health problems appear. After infection, the virus circulates in the blood, and sensitive tests can pick up its presence even when a person feels well. Different tests have different detection windows: RNA tests can identify the virus within about one to two weeks after exposure, p24 antigen can be detected a bit later, and antibody tests become positive several weeks after exposure. Because of these windows, someone can have HIV in their blood long before any symptoms show up, which is why early and routine testing is important. The other statements aren’t correct because HIV can be detectable in blood during the asymptomatic period, it isn’t restricted to transmission by blood transfusions, and it doesn’t require symptoms to be present to be in the bloodstream.