School Exclusions During Selected Pertussis Outbreaks, Oregon, 2017-2018

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 9751/2 school days. No excluded students were subsequently reported as cases.