Advances in researches on classification, host and human pathgenicity of coronavirus

Coronavirus (CoV) is a kind of zoonosis virus widely existing in nature. Since the outbreak of severe acute respiratory syndrome (SARS), the incidence of human CoV infections has increased, so as the severity of the infections. In particular, coronavirus disease 2019, which is still pandemic, has become a major public health issue of global concern. This review summarizes the classification, host of CoV and human diseases caused by CoV.