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It is now common for antibody tests to also test for antigens. These are called 4th generation tests or combined antibody/antigen (Ag/Ab) tests. In these tests the antigen being tested is a major HIV protein called p24. P24 (short for protein 24) is produced 2–3 weeks after infection and before antibodies are produced. P24 antigen is a viral protein that makes up most of the viral core. Serum concentrations of p24 antigen are high in the first few weeks after infection; tests sensitive to p24 an...more
Asked for male, 25 years old from Jaipur
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Asked for male, 24 years old from Bangalore
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Dear user. Thanks for the question. Hiv spread through contact between broken skin, wounds, or mucous membranes and hiv-infected blood or blood-contaminated body fluids. Deep, open-mouth kissing if both partners have sores or bleeding gums and blood from the hiv-positive partner gets into the bloodstream of the hiv-negative partner. Hiv can not spread through saliva. Take care.
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Asked for Female, 29 years old from Hooghly
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The ict filariasis test: a rapid-format antigen test for diagnosis of bancroftian filariasis. Antigen testing is now recognized as the method of choice for detection of wuchereria bancrofti infections. Unlike tests that detect microfilariae, antigen tests can be performed with blood collected during the day or night.
Asked for male, 23 years old from Kolkata
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Asked for male, 31 years old from Mumbai
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P24 antigen is a viral protein that makes up most of the viral core. Serum concentrations of p24 antigen are high in the first few weeks after infection; tests sensitive to p24 antigen are therefore useful for diagnosing very early infection when antibody levels are still low.
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Asked for male, 24 years old from Delhi
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What's the specific window period for different types of HIV tests?
Antibody tests ("Rapid" tests) — give a positive result based on antibodies to HIV, not the virus itself.
•2-8 weeks (up to 2 months) after infection, most people will have enough antibodies to test positive
•12 weeks (3 months) after infection, about 97% of people will have enough antibodies to test positive
Antigen tests (RNA tests) — show a positive result based on the presence of the virus. These tests are mo...more
Antibody tests ("Rapid" tests) — give a positive result based on antibodies to HIV, not the virus itself.
•2-8 weeks (up to 2 months) after infection, most people will have enough antibodies to test positive
•12 weeks (3 months) after infection, about 97% of people will have enough antibodies to test positive
Antigen tests (RNA tests) — show a positive result based on the presence of the virus. These tests are mo...more
Asked for male, 28 years old from Navi Mumbai
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