04/11/2014 03:28 pm ET Updated Apr 11, 2014

Measles Outbreak Traced To Fully Vaccinated Patient For First Time

Andy Ryan via Getty Images

Get the measles vaccine, and you won’t get the measles—or give it to anyone else. Right? Well, not always. A person fully vaccinated against measles has contracted the disease and passed it on to others. The startling case study contradicts received wisdom about the vaccine and suggests that a recent swell of measles outbreaks in developed nations could mean more illnesses even among the vaccinated.

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