Our expert says:
PEP (post-exposure prophylaxis) depends on various factors - The type of exposure, the patients status, patients viral, load, etc.
In the absence w ell-controlled studies the recommendations suggest a four-w eek course irrespective of the severity of exposure. The optimum treatment period is not know n. The duration of PEP is not based on experimental findings but rather on the average duration of time it takes to seroconvert - to "become positive" or to produce antibodies to fight infection.
With the correct treatment risk is considered to be low.
For more info see http://www.doh.gov.za/docs/misc/hiv/manual/postexposure_prophylaxis.pdf
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