Epidemiology of HIV Infection in the Developing World

  • Authors: Sunil Solomon, MBBS, PhD, MPH; Suniti Solomon, MD (More Info)
  • Editors in Chief: Daniel R. Kuritzkes, MD; Joseph J. Eron, Jr., MD
  • Last Reviewed: 4/1/16 (What's New)


  • Heterosexual transmission accounts for most HIV infections worldwide
  • The per-act risk of acquisition of HIV from an infected individual varies by the type of intercourse (Table 1) (Management Guidelines)

    [Smith 2005]
  • Other factors that influence likelihood of HIV transmission among heterosexual couples include STDs, HIV-1 RNA level, male circumcision, and the number of sexual partners[Chesson 2000; Gray 2001; Auvert 2005; Bailey 2007; Gray 2007; Gray 2012; Mehta 2013]
  • Sub-Saharan Africa
      South and Southeast Asia
        Central Asia and Eastern Europe
          South America

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