↑ vaccination rate, ↓ number of whooping cough cases. And the relationship is significant. http://t.co/s8E1aX9Lzq http://ift.tt/1vybpp6
— FiveThirtyEight (@FiveThirtyEight) August 24, 2014
via Twitter http://ift.tt/1m2Vat9
August 23, 2014 at 08:02PM
↑ vaccination rate, ↓ number of whooping cough cases. And the relationship is significant. http://t.co/s8E1aX9Lzq http://ift.tt/1vybpp6
— FiveThirtyEight (@FiveThirtyEight) August 24, 2014
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