BMJ Open · 2021 · 55 citations · 14 references
International travel was directly associated with the mortality slope and thus potentially the spread of COVID-19. Very early restrictions on international travel should be considered to control COVID-19 outbreaks and prevent related deaths.
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Comorbidity and its impact on 1590 patients with COVID-19 in China: a nationwide analysis
Wei-Jie Guan, Wenhua Liang, Yi Zhao et al. · European Respiratory Journal · 2020 · 3.7K citations · Full text
United Nations Statistics Division
Choice Reviews Online · 2006 · 1.2K citations
Demographic science aids in understanding the spread and fatality rates of COVID-19
Jennifer B. Dowd, Liliana Andriano, David M. Brazel et al. · Proceedings of the National Academy of Sciences · 2020 · 989 citations · Full text
Virus Epidemiology, Epidemiological Dynamic, Difficult Policy Decisions +20