Whooping cough cases surge to record levels in US, CDC says The HillWhooping cough cases up more than 340% over this time last year Fox NewsWhooping cough cases up 342% since 2023 as U.S. outbreak continues. What to know about symptoms and spread Fortune800+ cases of whooping cough in WA, 600+ in OR Fox 12 OregonMDH: Teenagers contributing to spread of whooping cough KSTP