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.
Red bars show the proportion of observed YFV cases in Minas Gerais that occur in each age class, in (A) males and (B) females. These empirical distributions are different from those predicted under two models of urban cycle transmission (M1 = white bars and M2 = orange bars; see text for details).
