Current research suggests that this novel coronavirus pneumonia originated in a wildlife market. Unexplained pneumonia was detected from December 2019, and the number of pneumonia cases increased to 44 on January 3, 2020, after which it was determined to be due to a novel coronavirus, which is extremely transmissible and the source of transmission may be wild animals. Wild animals contain a variety of viruses that can become infected when consumed by humans. This time the virus has an incubation period and is equally contagious during the incubation period, which is why the cases have spread to the whole country.