Figure 5.
Seasonality of measles in 1985–2011. The reported cases number by month before 1985 was not recorded in the historical documents.
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.