Abstract
The year 2020 will go down in history as the year of the Covid-19 pandemic, with the enormous challenges it posed to ordinary people and experts across disciplines, worldwide. Covid-19, which broke out in Wuhan in December 2019, soon spread rapidly in 2020 (1), till on March 11, the World Health Organization declared it a pandemic. According to the latest statistics, worldwide there have been a total of 173,331,478 cases of Covid-19 and 3,735,571 deaths (2).
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