Sequelae may occur after a positive cure of neocollins, light neocollins usually do not leave sequelae, patients with heavy neocollins have a certain probability of sequelae, and the majority of patients do not have sequelae. Respiratory sequelae, such as decreased cardiopulmonary exercise tolerance, are most often seen after neocoronavirus infection, and are one of the most common sequelae, mainly due to the obvious myopathic features of the diaphragm and interstitial lung injury in patients infected with the virus. Myocardial ischemia and myocardial damage triggered by respiratory sequelae may also cause patients to be prone to cardiac complications such as arrhythmia, atherosclerosis, and in severe cases, even heart failure. New crown positive cure may have sequelae, if infected with the new crown virus, must be actively treated, do not hide, so as to maximize the prevention of new crown sequelae after recovery.