.the school in yarmouth that year had a low opt-out rate � 2 percent, the superintendent said � so there was a cap on the amount of disruption an illness could cause..
but what if it had happened in one of the maine schools where the rate is 10 percent or more?.
not coincidentally, maine has a high rate of whooping cough cases � 21.1 per 100,000 people in 2015, compared to 10.3 per 100,000 nationwide..