人类空气传染的病原体来源于受染者的呼吸道分泌物,这些分泌物含有大量的致病菌并沾污环境的四周。病人的传染性微生物常常可以从其皮肤和被褥培养而得,因此有可能由直接接触或通过媒介物传染给一个易感者。病人还会通过咳嗽、喷嚏、吐痰、唱歌甚至谈话污染空气。喷出的飞沫粒大小不一。由较大呼吸飞沫滴的传播应认为是广义的直接接触。 Human airborne pathogens come from infected respiratory secretions, which contain large amounts of pathogens and contaminating the environment. Infectious microbes of patients can often be derived from their skin and bedding and therefore may be transmitted by direct contact with or through the vehicle to a susceptible person. Patients also pollute the air by coughing, sneezing, spitting, singing or even talking. Sprayed droplets of different sizes. Propagation of droplets by larger respiratory droplets should be considered as a broad direct contact.