Whooping cough cases in the US are the highest they’ve been in a decade - CNN

1. Whooping cough cases in the US are the highest they’ve been in a decade  CNN
2. U.S. whooping cough cases soar to highest level in a decade  The Washington Post
3. Oklahoma school closes due to whooping cough: What is pertussis? Is there an outbreak?  Oklahoman.com
4. U.S. whooping cough cases hit highest level in a decade  Axios