The question of how long it takes for a new crown to turn negative cannot be generalized, but depends on the severity of the patient’s condition, his or her immunity, physical condition and age. If the symptoms are mild in young people who are in good health, it may take a few days or a week or so for the new crown to turn negative. However, for some patients with poor autoimmunity, the virus may be present for a longer period of time, and there are some who have not turned negative for more than a month. For severely ill and critically ill patients, the treatment time will be significantly longer, and it may take several months for the patient to become negative. If a patient is suspected of having a new crown infection, it is recommended that he or she be examined in a hospital in a timely manner. If the diagnosis is confirmed, it is recommended that he or she be isolated in a timely manner and actively cooperate with his or her doctor for treatment.