The fever can go down on its own after a new coronavirus infection, because our body has a certain function to clear the virus. When the virus enters the body, it replicates and regenerates on its own. However, when it enters our body, it also activates our immune system. Immune cells can remove part of the virus through humoral and cellular immunity. When the number of viruses is cleared to a certain level, the temperature of the body will drop. However, when the body’s immune system is unable to clear the virus, the body temperature will remain in a high fever state. Therefore, the duration of fever in patients with the new coronavirus is mainly related to the quality of the patient’s body and the function of the immune system. If the immune system is strong, the fever will go down on its own. If the immune system is weak, there is a possibility that the fever will remain.