There have been 18,506 cases of whooping cough reported so far, the Centers for Disease Control and Prevention said. That’s the most at this point in the year since 2014, when cases topped

Whooping cough or pertussis numbers across the United States are at the highest level in the last ten years, according to the CDC. More than 18,506 cases have been reported so far - most at this point in the year since 2014.