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.
Geographical distribution of R0 estimates in the administrative cities of mainland China, at: (A) t = 1 (January 20th, 2020); (B) t = 8 (January 27th, 2020); (C) t = 15 (February 3rd); (D) t = 22 (February 10th, 2020); (E) t = 29 (February 17th); (F) t = 36 (February 24th, 2020); (G) t = 41 (February 29th, the end of the experimental time period).
