The National Health Construction Commission and the State Administration of Traditional Chinese Medicine announced the “new coronavirus infection of pneumonia diagnosis and treatment program (tentative fourth edition)”: ① incubation period is generally 3-7 days, the longest not more than 14 days; ② the majority of patients with a good prognosis, the symptoms of children’s cases are relatively mild; ③ children and young children also have morbidity; ④ the new coronavirus and the homology of SARS up to 85%. Source: National Health Construction Commission and the State Administration of Traditional Chinese Medicine