Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Monthly cumulated pertussis incidence rates per 100,000 inhabitants, France, 2017–2019a (n = 121)
a Because of the coronavirus disease (COVID-19) pandemic, the year 2020 was removed from the study period, for the analysis of monthly incidence rates of pertussis.
