The August 2008 issue of the American Journal of Primatology reported results of a year-long study of chimpanzees in Tanzania's Mahale Mountains National Park, which produced evidence of chimpanzees becoming sick from viral infectious diseases they had likely contracted from humans.
Terbitan bulan Agustus 2008 dari American Journal of Primatology melaporkan hasil penelitan bertahun-tahun terhadap simpanse di Taman Nasional Mahale Mountain, Tanzania, yang memberikan bukti bahwa simpanse menjadi sakit karena infeksi virus yang terjangkit pada manusia.