Figure 4.

Illustration to show the difference between aerosol “generating” versus aerosol “dispersing” procedures. A shows that a small amount of aerosols generated during normal breathing travel short distances before evaporation. B shows a burst of aerosols generated during procedures that provoke coughing such as suctioning, intubation, or bronchoscopy. In C, administration of therapeutic aerosols by nebulizer, noninvasive ventilation, or use of high-flow nasal cannula could disperse aerosols from the patient as a jet to a greater distance.