Get Virtual Care
For Businesses
About Us
A member asked:
Why do some clinic say hiv 4th gen antigen/antibody testing is very accurate at 21 days while some say 28 days. is it because they use different 4th gen kits?
A doctor has provided 1 answer
HIV test results: It just depends on what they mean by "very accurate". About 90% of newly infected people have positive AgAb HIV tests by 21 days -- very good by standards of many diagnostic tests for various medical conditions, but most persons at risk for HIV want more certainty, and these tests take 28 days to reach 98% reliability, 6 weeks for 100%. Performance is the same for all available HIV AgAb tests.
Answered 3/23/2020
90 views
Thank
Related Questions
A member asked:
26 days ago I went to massage parlor and received handjob with oil after and had small abrasion on penis. Yesterday I took HIV 1 & 2 antigen/antibody blood test and it was non reactive. How accurate is this test at 25 days? Further testing required?
3 doctors weighed in across 2 answers
A member asked:
What is the accuracy of p24 antigen and antibody HIV testing 4-6 weeks post PEP testing? For something incredibly minor, would this be reliable?
3 doctors weighed in across 2 answers
A member asked:
Which kit is more accurate to detect hiv antibody after 6 months, 3rd gen or 4th gen?
A doctor has provided 1 answer
People also searched for:
I tested HIV negative using 4th gen test kits (antibodies and antigen) 14 days after exposure. Am I safe?
Bloods done for HIV at GUM clinic. Would this test for antigens or antibodies or both? Tested 15 months out.
Question about HIV testing. I took a test that says it detects both antigen and antibodies, however it was a rapid test. They took my blood from a vein, instead of a finger. Test material serum, results in evening. How accurate at 8.3 (58 days) wks?
CMIA 4th gen antibody screening test (not antigen) for hiv 1 & 2 @50 days is 0.15 non reactive.Is antibody screening without antigen accurate @7thweek?
What is the accuracy of HIV testing (antibody and antigen) 6 weeks post PEP? I had all tests (Neg) including the pcr rna test at 22 days post pep.
Didn't find what you're looking for?
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your questionMore of what we treat
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HIPAASecure
SOC 2 Type 2Certified
JCAHOAccredited
Download HealthTap
Video visit and message your doctor
