Subject(s)

Betacoronavirus/pathogenicity , Coronavirus Infections , Cross Infection , Disease Transmission, Infectious , Endoscopy, Digestive System , Pandemics/statistics & numerical data , Pneumonia, Viral , Adult , China/epidemiology , Comorbidity , Coronavirus Infections/epidemiology , Coronavirus Infections/prevention & control , Coronavirus Infections/transmission , Cross Infection/etiology , Cross Infection/prevention & control , Digestive System Diseases/diagnosis , Digestive System Diseases/epidemiology , Digestive System Diseases/surgery , Disease Transmission, Infectious/prevention & control , Disease Transmission, Infectious/statistics & numerical data , Endoscopy, Digestive System/adverse effects , Endoscopy, Digestive System/methods , Female , Humans , Male , Pandemics/prevention & control , Pneumonia, Viral/epidemiology , Pneumonia, Viral/prevention & control , Pneumonia, Viral/transmission , Protective Devices/classification