Funding for this research was provided by:
National Science and Technology Major Project of China (No. 2018ZX10713001)
National Natural Science Foundation of China (No. 91846302)
the Key Research and Development Program of China (2019YFC1200604)
Received: 16 July 2022
Accepted: 24 March 2023
First Online: 2 May 2023
: It was determined by the National Health Commission of China that the collection of data on notifiable infectious diseases was part of continuing public health surveillance of infectious diseases and was exempt from Institutional Review Board assessment. All the data of cases used in this study were anonymized and personal identification information (e.g., name and street address) is not included in the data.
: Not applicable.
: The authors declare that they have no competing interests.