Dr. Sushil Kakkar
Dermatology
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Patient's Query
Hello doctor,
How accurate is the HIV(Human Immunodeficiency Virus) Ag/Ab test at 40th day after exposure? I know I should retest after three months, but could the symptoms show up, and the antibody is still hidden? Please give me an explanation.
Hello,
Welcome to icliniq.com.
The window period of the Ag/Ab test varies from 18 to 45 days. Therefore a negative test at six weeks (42 days) would be considered conclusive in 98-99 % individuals. However, a negative test at 12 weeks is still considered the golden standard (conclusive in 99.9 % of individuals). CDC (centers for disease control) recommends that a negative Ag/Ab test at six weeks is good enough to rule out HIV. Take care.
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Dermatology
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