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Objective To determine risks of exposure to and prevention of bloodborne virus infections among medical students during their elective period. Design Questionnaire study of students returning from their electives in 1997-8. Setting Urban teaching hospital. Subjects 220 final year medical students. Results 148 students (67%) returned questionnaires; all had been vaccinated against hepatitis B. 65 respondents (44%) had visited areas of relatively high endemicity for HIV, although 27 (42%) of these, all of whom had visited areas other than sub-Saharan Africa, were unaware of this. All but one had discussed their elective with advisers. Four students experienced percutaneous or mucosal exposure to potentially infectious body fluids, three in areas with a high prevalence of HIV infection. 44 respondents (30%) had experienced at least one such exposure during their clinical training; 75% of these exposures were unreported. 34% (13/38) students who visited areas known to have a high prevalence of HIV infection took with them a starter pack of zidovudine for post-exposure prophylaxis; 53% (20) took latex gloves and 63% (24) a medi-kit. None of the 27 students who were unaware that the areas they visited had a relatively high prevalence of HIV infection took zidovudine; only 15% (4) took gloves and 30% (8) a medi-kit. Conclusions Medical schools should produce, regularly update, and implement guidelines regarding protection from bloodborne viruses during clinical studies, including electives. Education and training in infection control should start at the earliest opportunity.

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