DTaP Vaccine Shows High Pertussis Effectiveness
A study found children with three or more doses have a 96.2% protection rate against the illness.
Updated on Oct. 16, 2026 in Allergies
Live Poll
Do you believe it is essential for children to complete the full childhood vaccine series?
A study published in the Morbidity and Mortality Weekly Report on October 15, 2026, confirms the DTaP vaccine remains highly effective against pertussis. Researchers found children who received at least three doses had a 96.2% effectiveness rate during the 2024 Alaska outbreak.
Why it matters
The findings highlight the critical role of the full five-dose DTaP series in preventing severe pertussis, as unvaccinated children face 26 times higher odds of infection. With national vaccination rates declining, the data underscores the ongoing public health challenge of maintaining immunity.
Children who received three or more DTaP doses demonstrated 96.2% vaccine effectiveness, while those with one or two doses showed 85.3% effectiveness. Unvaccinated children faced 26 times the odds of testing positive compared to the fully vaccinated.
The players
Morbidity and Mortality Weekly Report
This is a weekly epidemiological digest published by the Centers for Disease Control and Prevention that features public health information and research.
The details
Researchers evaluated vaccination status for children aged six months to six years by comparing VacTrAK records for those diagnosed with pertussis against a control group treated for acute coughs. The analysis focused on the 2024 Alaska pertussis outbreak to measure the real-world impact of the multi-dose series.
Timeline
2017-18: US kindergartner DTaP vaccination rate was 95.2%.
2024: Alaska experienced its highest pertussis case rate on record.
2025: 16 people died from pertussis in the United States.
2025-26: US kindergartner DTaP vaccination rate fell to 92.0%.
- 2026-10-15
Study published in the Morbidity and Mortality Weekly Report.
Health Landscape
The current 92.0% vaccination rate marks a concerning departure from the 95.2% benchmark achieved during the 2017-18 school year. Declining coverage levels complicate public health efforts to maintain herd immunity against highly contagious respiratory diseases.
Parents should review their children's immunization records to ensure the full five-dose DTaP series is completed according to the standard schedule. This proactive approach remains the most effective defense against the significant risks associated with pertussis infection.
The takeaway
Maintaining the full vaccination schedule is essential for providing children with maximum protection against pertussis. Families should consult with pediatricians to confirm their children are up to date with all recommended doses.
Further reading
For more information on immunization standards and disease prevention, visit our Allergies section.
Source note: This article includes information reported by Umn.
Live Poll
Do you believe it is essential for children to complete the full childhood vaccine series?
