… of sex partners and a high risk of sexually transmitted infections… Blood specimens were
collected in offices of the primary … and this difference persisted after we adjusted for number of sex …

… the oral mucosa as a result of genital–oral sex. … in 17 CD8+ T cells in the peripheral
blood may be a cytotoxic … differences in coreceptors 47,48 or qualitative differences in …

… West Equatorial Africa from direct exposure to animal blood as a … intercourse is the main
transmission route could result from a … HIV-1 genome, the overall observed genetic similarities in …

… 1998 from commercial sex workers recruited from truck stops … -discordant couples in Lusaka,
Zambia (1, 23). Clones with a … , our intrasubtype comparisons suggest that transmission of …

… or, for data on age and sex partners, with a numerical response. … The questionnaire was
validated by comparing its … Excess serum from blood obtained routinely for syphilis tests from …

… of sexual transmission by increasing virus load in the blood and … intercourse between
seroconcordant HIV-infected partners … infection with human immunodeficiency virus type 1 and …

… of origin of the infection, clinical stage of disease, sex of the … transmission between heterosexual
partners, one between … founder viruses and unique sequence differences between risk …

… Infection with the human immunodeficiency virus type 1 (HIV-1), as demonstrated by viral …
use of an enema before anal sex, insertion of a fist into a partner's rectum, or anal bleeding. …

… (41) showed, by comparing HIV-1 sequences derived from … transmission of HIV-1 found
in transmitter-recipient partners … minor variant of HIV-1 found in maternal blood at the time of …

… Human immunodeficiency virus infection affects about 42 million … must be used systematically
during intercourse. Thus, … Student's t test for mean or χ 2 test for percentage comparisons, …