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Most recent human epidemic viral diseases, including severe acute respiratory syndrome, Middle East respiratory syndrome, Ebola, and AIDS, have had a zoonotic origin. Defining the animal reservoir of these viruses can be helpful in preventing future epidemics. Earlier work showed that HIV-1 viruses in groups M and N probably arose from chimpanzee-to-human transmission of simian immunodeficiency viruses (SIVs) in southern Cameroon (NEJM JW Infect Dis Sep 2006 and Science 2006; 313:523). A multinational team of investigators has now shown that viruses in groups O and P were likely transmitted to humans from gorillas in the same area.
Researchers tested nearly 3000 fecal samples from gorilla populations in Cameroon, Gabon, the Democratic Republ…