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.
Colored boxes identify specific traits known to vary in space (yellow), time or among individual people (blue), mosquitoes (red), or viruses (green). Black bold text identify functional heterogeneities known to have a direct impact in virus pathogen transmission and propagation.
