1School of International Business, Xiamen University Tan Kah Kee College, Zhangzhou, 363105, China
2Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, SE-90187 Umeå, Sweden
3Heidelberg Institute of Public Health, Im Neuenheimer Feld 130/3, 69120 Heidelberg, Germany
4Department of Epidemiology and Global Health, Umeå University, SE-90187 Umeå, Sweden
*To whom correspondence should be addressed. Tel. +46706361635; Email: [email protected]
Teaser: Our review found the average R0 for COVID-19 to be 3.28, which exceeds WHO estimates from 1.4 to 2.5.