Application of aerosol allicin in prevention and treatment of new coronavirus infection and other respiratory tract infectious diseases

The invention relates to application of aerosol allicin to prevention and treatment of new coronavirus infection and other respiratory tract infectious diseases. The research finds that the new coronavirus only invades and infects respiratory tract epithelial cells expressing ACE2 and TMPRSS2; aerosol allicin can effectively inhibit TMPRSS2, so that new coronavirus is prevented from entering and infecting cells, infection factors in alveolar air can be eliminated, and new coronavirus infection can be effectively prevented and treated. In addition, the invention also finds that the aerosol allicin can effectively prevent and treat respiratory system diseases caused by infection factors of bacteria (such as mycobacterium tuberculosis, and Yersinia pestis), fungi (such as candida albicans andaspergillus niger), parasites (such as amoeba, giardia and leishmania), rickettsia and mycoplasma, and other viruses (such as influenza A, influenza B, encephalitis B, SARS, MERS, avian influenza and African swine fever) of