Figure 1.
Comparison of the emergency disposal timeline of H1N1 swine influenza (2009) and COVID-19 (2019).
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.