A 50-year-old male asked:
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I took HIV 4th gen.Elisa tests on 30days & 45days after unprotect sexual intercourse,results are negative. Are tests reliable & shorten 90days period.

1 doctor answer
Dr. Julie Abbott
44 years experience in Preventive Medicine
These new generation: HIV tests shorten the testing window considerably such that at 4 weeks over 95% of infections will be detected. You can relax:) But to get to 99.9% disease detection, the additional 4%, it takes 12 weeks/about 90 days...i.e. an additional 8 weeks. Consistently following safe sexual practices prevents this small, but often intense, anxiety while waiting these additional weeks. Stay well:)
Answered on Sep 29, 2016
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Dr. Hunter Handsfield
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Stop testing: All HIV tests, including those in use in India and other developing countries, are 100% reliable any time 3 months or more after the last possible exp ... Read More
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Dr. Olakitan Akinjagunla
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NOOOOoooooo!!!!!!!!!: Unless you are at risk by your current sexual practices, you can relax.
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Dr. Kathryn Dobbs
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Missed period: It is possible especially since it has been another 5 weeks since you were tested. You may have been too early for a positive test at 3 weeks.

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