![]() ![]() ![]() Covid-19 is caused by the infection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which potently elicits pulmonary inflammation and infiltration, as well as systemic inflammatory cytokine storms. The rapid outbreak worldwide could be reflected by the basic reproductive number that reached to 2.68 ( Wu et al., 2020). The number of cases might have been underestimated, possibly because asymptomatic viral carriers and patients with mild diseases have insidious or atypical symptoms and signs ( WHO Collaborating Centre For Infectious Disease Modelling, 2020). Since the initial epidemics in Wuhan city, China, coronavirus disease 2019 (Covid-19) has rapidly spread globally, with 84,237 and 2,314,621 laboratory-confirmed cases in China and throughout the world as of April 21st, 2020, respectively. ![]()
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