The risk of touching the mouth during nucleic acid testing is low, and care should be taken to sterilize and change the mask in a timely manner. When performing nucleic acid tests, especially large-scale nucleic acid tests, due to the large volume of work, medical staff cannot change gloves every time they perform a nucleic acid test. However, hand disinfection is usually carried out and gloves are sterilized using alcohol and other disinfectant solutions, so the possibility of infection is low. Therefore, after the occurrence of similar situations, the need to be detected to do a good job of self-protection, you can take a cotton swab dipped in alcohol, the touching area and the oral cavity for disinfection, and pay attention to rinse the mouth after the completion of. At the same time, after the completion of nucleic acid testing and sampling should be replaced in a timely manner to avoid prolonged use of the mask.