Table 2.

High-risk situation of viral aerosol, justifying the use of FFP3 masks.

High-risk situation for viral aerosols, justifying the use of FFP3 masks	Situations at potential risk of contamination
Tracheal intubation	Tracheal suction
Non-invasive ventilation (NIV): patient's plugging, unplugging, during the whole ventilation if leaks around the mask	Bronchial fiberscope
Invasive ventilation: if opening of the ventilatory circuit	Inhalation
Ventilation with self-inflating balloon with unidirectional valve
Tracheotomy