Respiratory infections such as influenza are transmitted through infectious particles, small enough to be suspended in air [1] . Influenza transmission can occur via large droplets, which only remain suspended in the air for a short period of time thus requiring close contact, and can occur via small airborne particles, which remain suspended in air for considerable longer periods of time, and can thus be transmitted over larger distances [2] . Furthermore, some transmission may occur via direct contact with respiratory secretions such as on hands and surfaces [2] .