Pertussis: A Persistent Cause of Morbidity and Mortality in Young Infants Joseph B. Cantey, MD1, Pablo J. Sanchez, MD1, Judy Tran, MPH, MT2, Wendy Chung, MD, MPH3, and Jane D. Siegel, MD1,2 In 2012, pertussis outbreak in a Dallas county resulted in the deaths of 4 children (3, unvaccinated; 2,