Reasonable application of medical alcohol at a concentration of 75% can achieve some killing of the new coronavirus. It is recommended that medical alcohol with a concentration of 75% be sprayed on items that need to be disinfected or applied directly to the items, so that the proteins of the virus shell can be dehydrated and coagulated and denatured to achieve the purpose of disinfection. The concentration of 95% alcohol, will cause the virus surface protein coagulation, alcohol can not enter the virus inside, the role of killing the virus is limited, so 75% of the medical alcohol is suitable for killing the virus. Spray alcohol need to pay attention to the flammable and volatile alcohol, spraying at home is easy to cause a short period of time the concentration of ethanol is too high, once encountered with open flames, high temperature objects can easily cause a fire. You can hand or cell phone and other items, local spray alcohol to disinfect, avoid spraying alcohol directly to the air. If the patient has fever, cough and other symptoms, consider the possibility of viral infection, need to consult a doctor in time.