Whooping cough cases spiking, especially among unvaccinated teens NBC NewsWhooping cough wave now worst in almost a decade amid back-to-school surge CBS NewsWhooping cough cases on the rise throughout Nebraska KETV OmahaMayo Clinic Minute: What is whooping cough? Mayo ClinicWhooping cough cases in Wisconsin are 12 times higher than last year, DHS says Milwaukee Journal Sentinel