Maximum window period for hiv
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HIV test accuracy, results and further testing
Next page: What happens after an HIV test?
Are HIV tests accurate?
Yes. Modern HIV tests are very accurate.
This accuracy has to be considered with the window period.
For example, 4th generation tests will pick up 99% of infections at six week.
Testing earlier, for example after four week, only detects 95% of infections.
Testing earlier needs a confirmatory test three months after the risk.
A positive test result is routinely confirmed using a different type of test called western blot. The western blot test looks for immune responses to specific HIV proteins and is 100% accurate as a confirmatory test.
Can anything affect the result of my HIV test?
HIV antibody tests, confirmed by the second test, are not generally affected by other circumstances.
This includes infections, medications, most vaccinations, putting on weight, eating or drinking anything before the test, use of alcohol or recreational drugs, mouthwash or time of day.
Your test result is accurate even if you had flu or a cold or are using any medication
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