摘要
INTRODUCTION After the outbreak of severe acute respiratory syndrome(SARS)and Middle East respiratory syndrome(MERS),it was difficult to imagine the recurrence of a virus that can spread worldwide in less than two decades.However,it did.In December of 2019,this virus called severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)was associated with the emergence of pneumonia cases of unknown etiology in Wuhan,Hubei Province.
