The new coronavirus is relatively contagious, and 15 seconds of contact causing transmission is entirely possible. The possibility of transmission does not lie in the time, but in the fact that if there is no protection and close contact with the patient, the risk of being infected increases at this time because of the high local viral load. For example, if both parties do not wear masks and communicate with the patient, transmission through droplets will result in infection with the new coronavirus, and even 2 seconds will result in transmission, so it is important to do a good job of protection. In addition, the risk of transmission can also occur in specific work environments where there is no air circulation, and it is recommended to wear a mask in unventilated locations to provide effective protection.