Why would it matter if that was the only way it was spread? Spread is spread. But damn, talking about backwards thinking.
"Heterosexual contact is the most common way HIV spreads in Africa, accounting for more than 80% of infections. However, other factors, such as blood transfusions and mother-to-child transmission, also contribute. "
As the epidemic of the acquired immunodeficiency syndrome (AIDS) in sub-Saharan Africa enters its second decade, much has been learned about the distribution and determinants of the disease and its causative agent, the human immunodeficiency virus (HIV). Over 6 million people, or 2.5% of the...
pubmed.ncbi.nlm.nih.gov