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.
Illustration of the Susceptible-Exposed-Infectious-Recovered-Dead structure and equations employed to model the SARS-CoV-2 epidemic in Italy. β, σ; γ, and μ were transmission rate, infection rate, removing rate, and the probability of dying among infectious individuals, respectively.
