Because chimps don't vaccinate
"…and why people get some neurological disorders, such as autism and Alzheimer's disease, whereas chimpanzees don't."
Seriously, though, how do they know that chimps don't get certain neurological disorders?
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wakeupandsmellthebacon, Fri 20 Feb 2015, 10:20,
Reply)
Chimps have been kept in captivity for many years
so I suppose researchers would have noticed the symptoms
abcnews.go.com/Health/Healthday/story?id=7670616
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Mudface The web isn't callipygian, Fri 20 Feb 2015, 10:37,
Reply)
captive chimps and other animals
are regularly vaccinated against human and non human infections
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A Rory Borealis here under duress, Fri 20 Feb 2015, 11:51,
Reply)