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Sexually acquired HIV infections: an analysis of epidemiological data concerning cases reported in Sweden 1988-90.

536 Swedish residents who during the years 1988-90 were reported as having contracted HIV through sexual contacts were asked about circumstances regarding the transmission. Answers were received in 411 (76.7%) of the cases (285 homosexual men, 68 heterosexual men and 58 heterosexual women). In 282 (69%) of the cases the persons were without symptoms and in 231 (56%) cases the infection was considered to be < 3 years old. Among homosexual men and heterosexual women the infection was usually acquired in Sweden or Europe whilst heterosexual men more often acquired their infection at casual contacts on other continents.