Abstract:
This paper introduces the respective epidemiological characteristics and clinical manifestations of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), including the wild-type strain, Delta variant and Omicron variant. It clarifies the current transmissibility, pathogenicity and virulence changes of the SARS-CoV-2, as well as the change in the clinical manifestations of patients. On this basis, this paper proposes the reasons and significance of changing the name of "Coronavirus Disease 2019" to " Coronavirus Infectious Syndrome 2019".