If there is an actual shortage of ventilators, they will almost certainly use medical and nursing students, and technicians to manually ventilate patients using

If there is an actual shortage of ventilators, they will almost certainly use medical and nursing students, and technicians to manually ventilate patients using a self-inflating bag (link describes bag mask ventilation, but the process is much easier and requires much less skill once the bag is attached to the breathing circuit after the patient has been intubated by the emergency or ICU doc.) https://en.m.wikipedia.org/wiki/Bag_valve_mask https://en.m.wikipedia.org/wiki/Bag_valve_mask