Epidemiological Update: Pertussis (Whooping Cough) in the Americas Region - 8 December 2025

Organization (WHO) in 2024, representing a 5.8-fold increase compared with the number of cases reported in 2023 (n= 167,407 cases). The highest proportion of cases was recorded in the WHO Regions of the Western Pacific (n= 591,193 cases) and Europe (n= 296,543 cases).

In the Americas Region, there was an overall decline in the number of cases reported annually between 2015 and 2019, and again in 2021-2022, when cases reached its lowest point with 3,284 cases. Subsequently, there was a significant increase in cases between 2023 (n= 11,202 cases) and 2024 (n= 66,184 cases).