About the Authors

Anan Wang

Contributed equally to this work with: Anan Wang, Yunfeng Tang, Zheng Pang

Roles Conceptualization, Writing – original draft

Affiliation School of Public Health, WeiFang Medical University, Weifang, China

Yunfeng Tang

Contributed equally to this work with: Anan Wang, Yunfeng Tang, Zheng Pang

Roles Formal analysis, Software

Affiliation School of Public Health, WeiFang Medical University, Weifang, China

Zheng Pang

Contributed equally to this work with: Anan Wang, Yunfeng Tang, Zheng Pang

Roles Funding acquisition, Methodology

Affiliation Tianjin Customs Port Out-Patient Department, Tianjin International Travel Healthcare Center, Tianjin, China

Yaxuan Gong

Roles Data curation, Investigation

Affiliation Yantai Zhifu District Center for Disease Control and Prevention, Yantai, China

Jintao Wu

Roles Data curation, Investigation

Affiliation Yantai Zhifu District Center for Disease Control and Prevention, Yantai, China

Jun Qi

Roles Conceptualization, Writing – review & editing

niugy@wfmc.edu.cn (GN); 13752253612@163.com (JQ)

Affiliation Tianjin Customs Port Out-Patient Department, Tianjin International Travel Healthcare Center, Tianjin, China

Guoyu Niu

Roles Conceptualization, Supervision, Writing – review & editing

niugy@wfmc.edu.cn (GN); 13752253612@163.com (JQ)

Affiliation School of Public Health, WeiFang Medical University, Weifang, China

Competing Interests

The authors have declared that no competing interests exist.