Some people are concerned that health care workers will bring out the virus when they travel on transportation or return home after treating and caring for patients with novel coronavirus pneumonia in sentinel hospitals. From a scientific point of view, health care workers, even when they come into contact with patients in isolation wards, will follow strict requirements for scientific protection before entering the wards to carry out their work, and will also go through proper disinfection protection measures and hospital protection means after finishing their work. Therefore, medical staff will not carry the virus when they leave the ward and hospital and need not worry too much.