About the Authors

Ying Li

Contributed equally to this work with: Ying Li, Jing Jia

Roles Data curation, Investigation, Software, Writing – original draft

Affiliations Chinese Field Epidemiology Training Program, Chinese Center for Disease Control and Prevention, Beijing, China, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China

Jing Jia

Contributed equally to this work with: Ying Li, Jing Jia

Roles Conceptualization, Investigation, Resources

Affiliations Chinese Field Epidemiology Training Program, Chinese Center for Disease Control and Prevention, Beijing, China, Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, China

Runze Lu

Roles Conceptualization, Investigation, Methodology, Visualization

Affiliation Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, China

Liyan Dong

Roles Data curation, Investigation, Writing – original draft

Affiliation Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, China

Lizhu Fang

Roles Data curation, Formal analysis, Methodology

Affiliation Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, China

Litao Sun

Roles Investigation, Software

Affiliation Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, China

Zongyi Zhang

Roles Conceptualization, Methodology, Software

Affiliation Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, China

Qing Duan

Roles Data curation, Investigation, Methodology, Software

Affiliations Chinese Field Epidemiology Training Program, Chinese Center for Disease Control and Prevention, Beijing, China, Institute for Infectious Disease Control and Prevention, Shandong Center for Disease Control and Prevention, Jinan, Shandong Province, China

Lijie Zhang

Roles Methodology, Writing – original draft

Affiliation Chinese Field Epidemiology Training Program, Chinese Center for Disease Control and Prevention, Beijing, China

Kunzheng Lv

Roles Conceptualization, Project administration, Supervision, Writing – review & editing

lvkunzheng@126.com (KL); mahl@chinacdc.cn (HM)

Affiliation Qingdao Municipal Center for Disease Control and Prevention, Qingdao, Shandong Province, China

Huilai Ma

Roles Conceptualization, Funding acquisition, Project administration, Supervision, Writing – original draft

lvkunzheng@126.com (KL); mahl@chinacdc.cn (HM)

Affiliations Chinese Field Epidemiology Training Program, Chinese Center for Disease Control and Prevention, Beijing, China, Office of Epidemiology (Technical Guidance Office for Patriotic Health Work), Chinese Center for Disease Control and Prevention, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.