Fig 3. Network of international collaborative relationships during COVID-19 period, January 1, 2020 to April 8, 2020.
Edges lower than 2 are removed.
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.