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Influenza virus can be spread via direct and indirect contact, large droplets, and aerosol particles ≥10 µm. But what about aerosol particles ≤4 µm, which can remain airborne for extended periods and can travel farther than droplets?
To better understand the mechanics of influenza virus transmission, researchers used a mechanical model in a simulated patient-examination room. The model involved a micropump nebulizer with a cough simulator, mimicking a source patient with influenza. A digital breathing simulator that acted as an exposed individual was located nearby. Aerosol samplers to capture and size-fractionate airborne particles were placed within the breathing simulator and throughout the room.
Infectious virus was found in all samplers …