[4 min read]
In this article:
- So far in 2025, there have been more than 9,000 cases of whooping cough, or pertussis, reported nationally. If the trend continues it will be the highest number since the vaccine was introduced in 1948.
- Washington State health officials have reported a total of 1,028 cases so far in 2025, compared to 193 cases reported at the same time in 2024.
- Whooping cough is particularly dangerous for infants, newborns and those with pre-existing conditions such as asthma. In the past six months, two Louisiana infants have died of the illness.
- Vaccination is the best way to protect yourself and your family, so make sure everyone's immunizations are current.
According to the U.S. Centers for Disease Control and Prevention (CDC), cases of whooping cough, also known as pertussis, are quickly climbing to pre-pandemic levels. Social distancing and other pandemic precautions suppressed levels of the illness, which is now seeing a significant post-pandemic bounce.
As of late April, the CDC has reported 9,048 cases of whooping cough so far in 2025. According to the BMJ (formerly known as the British Medical Journal) U.S. numbers at this point are more than four times the number of cases as the same time last year and more than 25 times the same time in 2023. If the trend continues it will be the highest number of infections since the whooping cough vaccine was introduced in 1948.
In 2024, the CDC reported an expectation of more than 10,000 cases of whooping cough for the year. Experts cautioned that the data might not reflect actual numbers because many people don’t even realize they have whooping cough when they are ill, and so never seek care or get tested. Declining immunization rates are also boosting whooping cough rates.
ProPublica reported that in Washington state, whooping cough vaccination rates have fallen significantly. Accoring to federal data, whooping cough the vaccination rate for kindergartners in Washington in 2023-24 was 90.2%, slightly below the U.S. rate of 92.3%. But the statewide rate for children 19 to 35 months last year was 65.4%, according to state data. In four counties, that rate was in the 30% range. In one county, it was below 12%.
Back-to-school time is particularly concerning because pertussis levels generally surge in the summer and fall. Additionally, COVID is back on the rise in many places and flu season is not far off. To learn more, we spoke with Benjamin Starnes, M.D., executive medical director for pediatrics at Swedish Health Services, who shared some insights into the dangers of whooping cough and how we can protect ourselves.
What is whooping cough?
Whooping cough is also known as Pertussis and is caused by a bacterial infection with Bordetella pertussis. It gets its name from the characteristic “gasp” or “whoop” that happens during a coughing fit as someone tries to catch a breath between coughs.
What are its symptoms and how can I tell if it’s not bronchitis or another respiratory illness?
In the beginning of the illness, whooping cough can look very much like the common cold with a runny nose, congestion, low grade fever and mild cough. While colds tend to improve in a week or so, the cough from whopping cough will worsen and may eventually come in severe fits. This cough can last many weeks, if not months. The cough may be severe enough to illicit the characteristic whoop when a person breaths in quickly between the coughs. Some people may vomit from coughing so much or even break a rib.
Why are we seeing this uptick?
Upticks in pertussis are not unusual and tend to happen every few years on a cycle. The germ that causes Whooping cough is very contagious. It can spread from person to person through the air as the result of coughing or sneezing. Some people may have very mild symptoms and think that they just have a mild cold thus unknowingly spreading it to others. During the pandemic, cases were lower, likely due to masking and social distancing. As the CDC reported, the current uptick is the bacteria returning to typical per-pandemic patterns.
How is it treated?
Pertussis can be treated with antibiotics. Unfortunately, the antibiotics need to be started very early in the illness to prevent progression of the cough. The best time to start treatment is before the cough begins which makes it very difficult as many will have very mild symptoms in the beginning. The absolute best treatment is prevention with the vaccine.
Do I need to worry about my other family members?
Young infants and newborns are at greater risk for severe cases of whooping cough. Newborns are too young for the vaccine and must rely on those around them being vaccinated for the best protection. Others at risk include those that have pre-existing medical conditions such as asthma or compromised immune systems.
Do I need to worry about sending my child back to school?
Ultimately, the best protection you can give your child is to make sure their vaccinations are up to date before school starts. Because of the pandemic, vaccination rates for kids fell and many are just now catching up. If your kids aren't current with their immunizations, or you are not sure, please contact your pediatrician’s office. The vaccine is very effective, but immunity can wane over time. This is why children receive several whooping cough vaccines over their childhood with either the DTaP, which is recommended for infants and young children between the ages of six, or Tdap, which is recommended for preteens and adults. You should discuss which vaccine is right for you and your family members with your physician.
How can I avoid it?
Get vaccinated! As with any infection, frequent handwashing, avoiding others who are sick, wearing masks in close shared spaces are your best bets.
Learn more and find a physician or advanced practice clinician (APC)
If you have questions about vaccinations or your child’s wellness health, Swedish Pediatrics can help. If your kids aren’t up to date on immunizations, particularly the measles vaccine, call their pediatrician today to schedule a visit.
You can contact Swedish Primary Care to schedule an appointment with a primary care physician or advanced care clinician. If you or a child has symptoms, you can connect virtually with a member of your care team who can review the symptoms, provide instruction and follow up as needed. With Swedish ExpressCare Virtual you can receive treatment in minutes for common conditions such as colds, flu, urinary tract infections, and more. If you don’t have a doctor, use our provider directory to find a specialist or primary care physician near you.
Information for patients and visitors
Additional resources
Information from the Washington State Department of Health
Vaccinations help your kids stay healthy now and in the future
Pertussis (Whooping Cough) | Washington State Department of Health
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This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
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