PURPOSE OF REVIEW: This review describes the nature and frequency of HIV-1 superinfection and provides advice regarding counselling of patients in accordance with national guidelines. RECENT FINDINGS: Recent studies have demonstrated conflicting results, from no superinfection to an incidence of over 18%. We discuss the difficulties comparing studies due to population and methodological differences. SUMMARY: HIV-infected individuals should be counselled that there is risk of superinfection at all stages of HIV, but this is unlikely to be clinically significant unless transmission of resistance occurs. The risk may be as high as the risk of new incident infection in the presence of on-going exposure.
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Waters et al. (2011) studied this question.
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