Funding for this research was provided by:
China Mega-Project on Infectious Disease Prevention (2018ZX10713001)
Received: 21 October 2020
Accepted: 18 November 2020
First Online: 3 December 2020
Ethics approval and consent to participate
: This article was based on analysis of routine surveillance data from China CDC and Chinese Academy of Meteorological Sciences. No personal information was disclosed.
: Not applicable.
: Xiao-Nong Zhou is the Editor-in-Chief of <i>Infectious Diseases of Poverty</i>. He was not involved in the peer-review or handling of the manuscript. The authors have no other competing interests to disclose. The other authors declare that they have no competing interests.