A member asked:

Confused. took 4th gen ag/ab rapid test at 30 days at clinic. was negative. counselor said conclusive at 28 days, no need to retest, and my exposure was low risk. but i see different window periods online. do i retest? or listen to testing site?

A doctor has provided 1 answer
Dr. Hiep Le answered

Specializes in Nephrology and Dialysis

A non-reactive test at 30 days is probably conclusive when we put together all the facts (low risk exposure, asymptomatic and negative test with 95% sensitivity after 4 weeks). What you have read online is also accurate if we base on the test sensitivity only then it has to be at 6 weeks then the test sensitivity will be 99.9%. Take care.

Answered 5/2/2023

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