Which HIV type is associated with different geographic regions around the world?

Updated: Mar 05, 2020
  • Author: Delia M Rivera, MD; Chief Editor: Russell W Steele, MD  more...
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HIV-1 is the most common cause of HIV infection in the Americas, Europe, Asia, and Africa. HIV type 2 (HIV-2) has caused epidemics in West Africa, though this virus is also found in European countries. HIV-1 subtypes differ by geographic region. Non-B subtypes are particularly prevalent in Africa and in Asia. The high transmission rate from Africa to Europe has increased the diversity of subtypes in Europe.

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