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Table 1 Comparison of HIV-1 and HIV-2 characteristics

From: HIV-2 and its role in conglutinated approach towards Acquired Immunodeficiency Syndrome (AIDS) Vaccine Development

CHARACTERISTICS HIV-1 HIV-2
Infectivity High Low
Virulence High Low
Heterosexual Spread Higher Lower
Vertical Transmission 20-25% ≤5%
Genetic Diversity -- Lower
Prevalence Global West Africa
Origin Common Chimpanzee Sooty Mangabey
Time to Aids ≤10 Years ≥20 Years