Fifteen Oregon schools excluded undervaccinated students when struck by pertussis outbreaks during the 2017-2018 school year. Of 243 under- or unvaccinated, exposed, students in these schools, 134 (55%) accepted vaccination, and 87 (36%) were excluded and missed a total of 975½ school days. No excluded students were subsequently reported as cases.
Keywords: pertussis; vaccination and exclusion.
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