Figure 1.
Incidence of laboratory-confirmed pertussis per 100,000 population, Denmark, 1995–2013 (n = 13,269)
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.