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Yes, it's called Herd Immunity, a quick glance at the Wikipedia article show some percentages for common diseases. http://en.wikipedia.org/wiki/Herd_immunity h
by henrikschroder 16y ago
Yes, it's called Herd Immunity, a quick glance at the Wikipedia article show some percentages for common diseases.
http://en.wikipedia.org/wiki/Herd_immunity http://en.wikipedia.org/wiki/Herd_immunity