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Vaccine refusal tied to increased risk of measles and pertussis
Reuters

Parents who delay or skip childhood vaccinations even when kids have no medical reason to avoid their shots are contributing to U.S. outbreaks of measles and pertussis, a research review suggests.

More than half of 1,416 measles cases reported in the U.S. since the disease was declared eliminated in 2000 were for people with no history of measles vaccination, the analysis found.

Among more than 10,000 pertussis patients with known vaccination status, 24 to 45 percent of people in the five largest statewide epidemics since 1977 were unvaccinated or only partially vaccinated, the analysis also found.

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