Civil aviation transport is an important source of global respiratory disease spread due to the closely-spaced environment. In order to reduce the probability of infection of passengers. an improved Wells-Riley model for cabin passenger risk assessment have been given in this work. the cabin ventilation and passenger nose and mouth orientation were considered. https://www.bekindtopets.com/hot-find-Synovex-One-Grass-Extended-Release-Implant-10-Dose-special-find/