Coronavirus disease 2019 belongs to the category of "epidemic disease" in traditional Chinese medicine exogenous disease.When the same pathogenic Qi invades the human body, the development, progression, and prognosis of the disease vary with an individuals body constitution. With coronavirus disease 2019 as an example, individuals with different constitutions have different degrees of susceptibility to exogenous pathogenic factors, and "prevention before disease onset" can be performed for the susceptible population based on body constitution. The tendency of constitution factors to influence disease transmission can be avoided by regulating the biased constitution to prevent the disease from exacerbating. Patients with different body constitutions tend to have different prognoses, and regulation of the bodys Qi-blood and Yin-Yang can help to achieve "the prevention of recurrence after recovery".