what are the chances of a hiv negative person at 90 days become positive at 6 month? for a low rish exposure does that ever happen ? i am aware of the late seroconverters with predisposing medical conditions take longer time to seroconvert apart from such people ,do normal people need to be worried of such a senario ??
HIV antibody tests in a normal individuals - should be done atleast after 4-12 weeks of exposure. (Antibodies to HIV are produced by 4 weeks in 90% individuals who had a infective exposure and a positive test result). The test result at the end of 12 weeks can be considered conclusive. (This is to clear any remaining doubts).
It is extremely rare for a NORMAL person to take any longer then 6 months to develop detectable antibodies.
Conditions that result in late production of antibodies are rare genetic diseases - and do present much earlier in life and individuals will always be sick with respiratory and diarrheal infections throughout their life.
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