The Wyoming Department of Health has confirmed 30 cases of pertussis (whooping cough) so far this year, marking a significant increase from the 19 total cases reported in 2024, Wyoming News Now reports.
The majority of cases—about two-thirds—have been identified in Sheridan County, but the illness has also been reported in eight other counties across the state.
Pertussis is a highly contagious respiratory infection caused by the Bordetella pertussis bacterium. According to Dr. Steve Cobb, Chief Medical Officer at Banner Wyoming Medical Center, many people who contract the illness may not realize it, as symptoms can be mild. However, they can still spread the disease to others.
“Once the bacteria has settled in, it creates a persistent cough that just won’t go away,” Cobb explained. “It’s associated with taking deep breaths that sound like a ‘whoop’, which is how the disease got its nickname—whooping cough.”
While anyone can contract pertussis, infants and the elderly are particularly vulnerable to severe complications, hospitalization, and even death.
“Like many other respiratory diseases, it’s our most vulnerable that get very sick,” Cobb said. “Infants are especially at risk, which is why it’s so important to protect them.”
Despite the recent increase in cases, Cobb emphasized that pertussis is a completely preventable disease. Routine immunizations help protect against the illness, but occasional outbreaks still occur.
For expecting parents, Cobb stressed the importance of maternal vaccination, as newborns have no natural protection against pertussis at birth.
Health officials recommend staying up to date on vaccinations and seeking medical advice if a persistent cough develops, especially in households with young children or elderly individuals.
