after the U.S. and other high-income countries switched to pertussisvaccines after the 1970s that triggered fewer side effects but also are less effective at guarding against disease and spread.
Kathy Bell, Anchorage School District director of healthcare services, holds a dose of the DTaP vaccine in her office on Tuesday, Sept. 10, 2024. DTaP protects against pertussis. A number of pertussis ...