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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

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