Alcohol can kill delta virus, but the required alcohol concentration is 75%, and complete killing is not guaranteed, there may be residues, in addition to the requirement that it is used in vitro, it is useless to kill the virus by drinking alcohol. New coronavirus belongs to RNA virus, prone to genetic mutation, delta is a mutant subtype of the new coronavirus. Delta has greater transmissibility, higher viral load, and greater pathogenicity. The use of alcohol at a concentration of 75% denatures and dehydrates and coagulates the viral proteins to destroy the virus. Too high or too low a concentration of alcohol may affect the effectiveness of alcohol in destroying the virus. Normally, you can use 75% alcohol to disinfect office supplies, wipe cell phones, keys and the surface of courier boxes so as to disinfect them, but be careful that the alcohol must be used away from open flames to avoid fire. For New Coronavirus, it is recommended that timely vaccination against New Coronavirus, attention to hygiene protection, frequent hand washing, wearing a mask and maintaining a certain social distance can reduce the rate of infection, serious illness and mortality.