Herd Immunity

Herd immunity is a key component of public vaccination campaigns that keep everyone healthy and safe from preventable diseases.  538 did an article on this topic recently, and included a reference to FRED.

FRED is pretty interesting.  You can pick a location and view the impact of a Measles case over time.  With an 80% vaccination rate, measles cases soar.  With rates of >95%, though, a case doesn’t spread.  The importance of high vaccination rates is pretty clear.

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