Usually 75% alcohol is effective in killing the new coronavirus in 1 to 2 minutes, and alcohol that is too low or too high in concentration is usually not effective in killing the new coronavirus. Normally 75% alcohol is effective in killing the new coronavirus in 1 to 2 minutes. Because the concentration of 75% of the alcohol molecules have strong permeability, can pass through the surface membrane of the new coronavirus, enter the virus inside, so that the protein constituting the basis of the life of the virus coagulation, the new coronavirus will be killed. Concentrations of alcohol that are too low or too high are generally not able to kill the Neocoronavirus. When the concentration of alcohol is too high, a protective film will form on the surface of the new coronavirus, making it impossible for alcohol to enter. When the concentration of alcohol is too low, although it can enter the neocoronavirus, it cannot kill it completely.