infectious respiratory aerosol infectious aerosol Oliver He Respiratory aerosols that contain infectious particles. Aerosol size is determined by the force and pressure involved in the generation of the particles. The final size depends on the nature of the fluid containing the organisms, the force and pressure at emission, the initial size of the aerosol, environmental conditions (e.g. temperature, relative humidity and airflow), the time spent airborne, and the size of the organisms within a droplet. https://apps.who.int/iris/bitstream/handle/10665/112656/9789241507134_eng.pdf aerosol