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.
Four different models to describe disease dynamics. Compartments S, E, I and R refer to individuals being susceptible, exposed, infectious or recovered, respectively. The arrows indicate transition rates in disease status. (Note, these models are individual-based, so transitions from susceptible to infectious are given on a per capita basis βI rather than the usual βSI.)
