When Dr. Erin Mears is in Minneapolis racing to isolate the infected IMM executive from the bus, she can be seen wearing an N95 mask with an exhaust vent, about to put a similar one on the victim to limit his infectiousness to others. Vented N95 masks have a one-way valve that lets exhaled breath bypass the filtering for easier exhalation. She should be using a non-vented N95 mask on the infected patient.

Film

Contagion (2011)

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