In addition to the common viral pneumonia mentioned above, human viral pneumonia can also be caused by other viruses such as respiratory syncytial virus, parainfluenza virus, adenovirus, rhinovirus, etc. Respiratory syncytial virus (RSV) was first isolated by Morris from the nasal secretions of gorillas with upper respiratory tract infection in 1955. It belongs to the genus pneumovirus of the family Paramyxoviridae and has only one serotype. The highest incidence rate is in infants under 6 months old. This virus infection accounts for 25% of infants hospitalized for pneumonia and 75% of bronchiolitis. Parainfluenza virus belongs to the family Paramyxoviridae and has four serotypes: 1, 2, 3, and 4. The main cause of pneumonia is type 3. Adenovirus was first isolated from the glandular tissue of the human body. There are 41 serotypes of this virus that can cause human diseases. Among them, types 3, 4, 7, 11, 14, and 21 are prone to cause pneumonia. In my country, types 3 and 7 are the most common. According to virological monitoring in Beijing, Shanghai, Guangzhou, Hebei, Xinjiang and other places in my country in recent years, adenovirus and respiratory syncytial virus are the first and second causes of lower respiratory tract infections in children, respectively.