SARS CoV infection in humans with about 10 case fatality rate was first reported from China in 2002, while MERS CoV infection in humans with about 34.4 case fatality rate was first reported from Saudi Arabia in June 2012. 2019 nCoV was first reported from China in December 2019, and is currently infecting more than 70000 people with about 2.7 case fatality rate . ...Nevertheless, the intermediate host for 2019 nCoV is still under investigation and the vaccines against this new CoV have not been available. ...