More children and teens affected by the measles outbreak in Quebec in 2011 got their initial dose of the measles vaccine at 12 or 13 months of age, according to a Canadian study in the journal Pediatrics. First measles vaccination at the recommended age of 12 months was associated with a three- to fourfold increased risk of getting the disease compared with first vaccination at 15 months of age or older, according to researchers.

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