OLYMPIA, Wash. — Across the state of Washington, whooping cough cases dramatically increased from 2023 to 2024. In 2025, cases are already more than half of last year’s total.
According to the Washington Department of Health, 2024 saw 2,261 confirmed whooping cough cases. That’s 25x the 87 reported cases in 2023.
So far in 2025, 1,314 cases have been reported.
DOH says vaccinations remain the best way to protect yourself and Washington is seeing large drops in rates among young kids.
The Department of Health says 73% of 19-35-month-olds were vaccinated in 2019 and that fell to 65% in 2024.
You can find more information in the DOH’s Annual Pertussis Summary.
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