Global Pertussis Outbreak Includes the U.S.

Due to the ongoing decline in pertussis vaccination coverage and the current resurgence of pertussis (whooping cough) cases in the Americas Region, the Pan American Health Organization/World Health Organization (PAHO/WHO) urges Member States to enhance their epidemiological surveillance systems and vaccination rates.

In the Americas, 2012 saw the highest number of cases in the decade, with 72,328 reported cases of pertussis. As of now, there is a provisional total of 43,751 cases for the year 2024.

In the United States, between EW 1 and EW 18 of 2025, 10,062 confirmed and probable cases of pertussis, including five deaths, have been reported. Most of these pertussis cases have been reported in Washington, Oregon, and California.

For comparison, the U.S. CDC reported 7,063 pertussis cases in the United States for the entire year 2023.

On May 31, 2025, the PAHO/WHO wrote, Prioritizing the timely identification of population groups that are not receiving the recommended pertussis vaccines is essential, particularly for unvaccinated infants or those with incomplete vaccination schedules.

It is crucial to continuously monitor vaccination coverage among children, with a specific focus on those under 1 year and 5 years of age.

By taking this approach, corrective actions can be implemented to address immunization gaps and prevent outbreaks.

The PAHO/WHO says there are no pertussis only available against pertussis. Pertussis vaccines that exist have a combined presentation that includes other DTP (Diphtheria, Tetanus and Pertussis) antigens, Tdap, Hepatitis B, Haemophilus influenzae type b and poliovirus.

Vaccines containing DTPs can be given after six weeks of age, and three doses are required in the primary series.

Furthermore, booster doses are necessary to maintain immunity against the disease.

These pertussis vaccines are generally offered at pharmacies in the U.S.

As of June 3, 2025, a country-by-country pertussis outbreak summary is posted at this PAHO/WHO link.