New coronavirus infection of pneumonia belongs to the lower respiratory tract infection, which is more difficult to transmit when breathing normally. When coughing and coughing violently, the virus is more likely to be transmitted through droplets or form aerosols that land on the ground and on the clothing of people around them, allowing them to touch and cause infection. Therefore, there is a risk of contracting New Coronary Pneumonia when you are within 1m distance from an infected person. The mask and helmet can properly play the role of isolating droplets and aerosols, so disinfecting the mask and helmet after going home can effectively kill the potential new coronavirus.