How can we be sure that the current measles outbreak is really due to too few people getting vaccinated? And what was the immunization coverage of visitors at Disneyland during the days the virus was circulating there?
A study in JAMA today addresses both these questions with some pretty clever calculations. The second question sounds like an impossible one to answer, but, in fact, we know enough about measles and its vaccine to come up with a pretty good estimate of coverage at Disneyland and in the various commu...
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