Unvaccinated children spread pertussis across communities during an outbreak, new study finds

While more than 90 percent of Oregon children are vaccinated against pertussis, this protection is not enough to stop pertussis from spreading when those choosing not to vaccinate share social networks, schools or other connections, according to a new study by the Oregon Immunization Program. "The Timing of Pertussis Cases in Unvaccinated Children in an ["]

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