Children, on the one hand, are weaker, have a lower immune system, the virus replicates quickly after infection and the body is less able to detoxify itself, which is slow and prolonged; on the other hand, younger infants and children have a weaker ability to regulate their body temperature and are prone to catching cold. In addition, if they do not develop good hygiene habits, wash their hands in a perfunctory manner, fail to wash their hands regularly or have bad habits such as chewing their fingers, they are prone to catching the virus, leading to colds and fevers.