OLYMPIA, WA — The Washington State Department of Health (DOH) is reporting a significant rise in whooping cough cases across the state, with more than 2,200 confirmed and probable cases recorded in 2024—a 25-fold increase from the 87 cases reported in 2023.
Pertussis, commonly known as whooping cough, is a bacterial illness that begins with cold-like symptoms and can develop into severe coughing spells. It poses a serious risk to infants under one year of age, who may suffer from apnea, pneumonia, and other complications. In severe instances, the illness can be fatal. In 2024, the state recorded its first whooping cough-related death since 2011.
As of May 31, there have already been 1,314 reported cases this year.
Health officials attribute the rise in part to declining childhood vaccination rates. Among children aged 19–35 months, vaccine coverage has dropped from 73% in 2019 to 65% in 2024.
DOH officials are urging the public to stay current on vaccinations, especially those at higher risk or in close contact with vulnerable individuals. Priority groups include:
- Infants under 1 year old
- Pregnant individuals, particularly in the third trimester
- Families and caregivers of young children
- People with weakened immune systems or chronic respiratory conditions
- Adults aged 65 and older
Antibiotics are typically used to treat whooping cough, with early treatment recommended to prevent spread and reduce the severity and duration of symptoms.
More information, including prevention guidance and vaccination resources, is available on the DOH’s whooping cough web page.
