ix accessory proteins (3a, 6, 7a, 7b, 8, and 10) (Figure 2A). Same as SARS-CoV and MERS-CoV, 2019-nCoV appears to have no HE gene. The virion of 2019-nCoV consists of similar structure as SARS-CoV and MERS-CoV (Figure 2B). Like SARS-CoV, 2019-nCoV also uses ACE2 as its cellular receptor to enter host cells (Zhou et al., 2020). Currently, the structure of 2019-nCoV R