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November 14th, 2012 (12:18 PM).
Originally Posted by
It is really rare in the modern world because the population was vaccinated. That's how you fights these
Stop that and it returns
Old, but I just now saw this:
There's a term in Epidemiology called 'Herd Immunity' - basically, in order for a population to become immune to a pathogenic disease, 80-90% must be effectively vaccinated against that disease in order to prevent a widespread outbreak. Every single person who opts not to get vaccinated jeopardizes not only their own health but the communities health.
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