Pneumonia is not a contagious disease, so pneumonia in children is not contagious. The cause of pneumonia is mostly caused by viruses or bacteria, but can also be caused by pneumonia virus, mycoplasma, and chlamydia infections. The above pathogens can be spread to other children who are not sick through close contact between children, or when a child with pneumonia coughs or sneezes, via respiratory droplets, and children who are not sick may develop pneumonia after being infected with the above pathogens. Therefore, when a child has pneumonia, he or she should be treated at home or hospitalized, and go out less and go to less crowded places to prevent the pathogens from being transmitted to others. Families should take their children outside and wear masks, go to less crowded places, wash their hands after going out, and open windows at home to reduce the chance of getting sick.