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.
Time profiles of the proportion of susceptible (
), carrier (
), and infectious (i) compartments for different values of the basic reproduction number 
and 
. Increasing values of 
lead to faster convergence toward the endemic equilibrium and a lower equilibrium proportion of susceptibles, reflecting enhanced transmission and sustained endemic persistence
