As a novel infectious disease, the possibility of virus mutation over a period of time cannot be ruled out. Based on the knowledge of coronavirus or virology as a whole, no mutation has been found. The differences between the viruses detected are very small, less than 1%. These differences are still being identified and further monitoring is needed. (Press Conference of the State Council Information Office on January 26th, 2020)

The whole-genome sequencing of 104 COVID-19 strains isolated from different locations confirmed that the homology reached 99.9%. Based on this result, the WHO investigation group concluded that no significant mutation had been found. (Press Conference of China-WHO Joint Mission on COVID-19 on February 24th, 2020)

Source: Chinese Center for Disease Control and Prevention