U.S. health officials have warned for months about a resurgence in breakthrough infections in older children and adults, even though unvaccinated young children and newborns of unvaccinated moms remain the most vulnerable to both infection and severe disease, CBS News reported.

The U.S. is experiencing more than four times as many whooping cough cases compared with last year — a spike that some experts attribute to post-pandemic vaccine fatigue.

DHS had logged 625 confirmed cases of whooping cough, or pertussis, in 2024. That's compared to 51 cases last year. So far this year, two-third of Wisconsin counties have reported at least one case of the respiratory infection.

DHS says whooping cough levels in Wisconsin are more than twelve times higher than in 2023. The spike marks levels not seen since before the pandemic. Wisconsin has recorded 625 confirmed cases of pertussis in 2024 so far.

UW Health's Dr. Bill Hartman discusses a significant increase in Wisconsin whooping cough cases, as well as a study about microplastics in the brain.

Health officials in Snohomish County are sounding the alarm over a spike in whooping cough cases, a highly contagious respiratory infection also known as pertussis.

The Nebraska Department of Health and Human Services is warning about an uptick in whooping cough cases across the state this year.