- U.S. whooping cough cases soar to highest level in a decade The Washington Post
- Whooping cough cases reach highest level in a decade NBC News
- U.S. whooping cough cases hit highest level in a decade Axios
- Are Pertussis cases the canary in the coal mine? Lake County Record-Bee
- Whooping Cough Aftermath: A Life of Complications Santa Barbara Independent
Source: Google Finance – Market News