Based on the results of expert studies, it is believed that this novel coronavirus was transmitted from wild animals (probably bats) and then human-to-human transmission occurred, resulting in this novel coronavirus. For the new coronavirus, only 7 coronaviruses have been found in the current study. Two of the previous six coronaviruses have serious effects on humans, such as SARS virus and MERS virus, and this novel coronavirus is a new coronavirus that is transmitted from animals to humans and is associated with human-to-human transmission. This new coronavirus has not been found in humans and is an RNA virus, which has no cell wall and is single-stranded, so it is more mutable and prone to relevant infectious mutations. Content source: Dr. You Lai