Recently,the World Health Organization(WHO)has declared the novel coronavirus(2019-nCoV)outbreak a Public Health Emergency of International Concern(PHEIC),1 which is now formally named as severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).2 As of 27 February 2020,a total of 82,178 cases of SARS-CoV-2 infection have been confirmed across the world,with 78,630 cases in China(https://ncov.dxy.cn/ncovh5/view/pneumonia?source=).The SARSCoV-2 has been determined as the seventh member of the coronaviruses infected humans.3 Moreover,similar to severe acute respiratory syndrome coronavirus(SARS-CoV)and Middle East respiratory syndrome coronavirus(MERS-CoV),the SARS-CoV-2 could also cause severe and fatal illness.3 Since the SARS-CoV-2 outbreak,there have been approximately 14,792 clinically severe cases and 2800 dead cases.
