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Despite a higher incidence of other sexually transmitted diseases (STDs), HIV-2-infected women had a lower incidence of HIV-1 than did HIV-seronegative women, with a relative risk of 0.32 (\n            <jats:italic>P<\/jats:italic>\n            = 0.008). An understanding of the cross-protective mechanisms involved may be directly relevant to HIV-1 vaccine development.\n          <\/jats:p>","DOI":"10.1126\/science.7539936","type":"journal-article","created":{"date-parts":[[2006,10,27]],"date-time":"2006-10-27T18:19:42Z","timestamp":1161973182000},"page":"1612-1615","source":"Crossref","is-referenced-by-count":170,"title":["Natural Protection Against HIV-1 Infection Provided by HIV-2"],"prefix":"10.1126","volume":"268","author":[{"given":"Karin","family":"Travers","sequence":"first","affiliation":[{"name":"Department of Cancer Biology, Harvard School of Public Health, Boston, MA 02115, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Souleymane","family":"Mboup","sequence":"additional","affiliation":[{"name":"Laboratory of Virology and Bacteriology, University Cheikh Anta Diop, Dakar, 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