HIV Ab/p24 Ag with Reflex is a diagnostic test used for the detection of HIV infection. It combines the identification of antibodies (Ab) and p24 antigens (Ag) associated with the HIV virus. The test is usually performed as an initial screening tool, utilizing a sensitive combination assay to detect both the presence of antibodies produced by the body in response to HIV and the p24 antigen, which is an early marker of HIV infection. If the initial test yields positive or inconclusive results, further confirmatory tests, such as the Western blot or nucleic acid testing (NAT), are typically recommended as a follow-up step for definitive diagnosis. This reflex testing approach ensures accurate and timely identification of HIV infection, enabling appropriate medical intervention and management strategies.
Every lab result you’ve ever had, charted and explained.
Healthmatters is a tracker for your lab results. Upload a report from any lab, any country — every marker charted and explained.
Start with my report →All our content is backed by peer-reviewed studies, academic research, and trusted medical sources. We’re committed to accuracy and transparency — see our editorial policy for details.