On January 20, 2020, the first known case of covid-19 in the U.S. was reported—a man in his 30s who had traveled back to Washington State from Wuhan, China, where the first cases of the novel viral disease had been discovered in December 2019. Nearly everyone failed to predict the full scale of the devastation that…
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Source : What Scientists Wish They Knew a Year Ago About the Covid-19 Pandemic
