- Clark County has 406 cases of whooping cough — the highest number in Washington The Columbian
- Whooping Cough declared community outbreak in Spokane County & North Idaho KREM.com
- Washington state sees ‘sharp increase’ in whooping cough cases, mirroring rise across US ABC News
- Health officials issue warning about increase in whooping cough cases WSOC Charlotte
- VIDEO: ‘Quindemic’ concerns among winter illnesses KIRO Seattle