A group of MIT engineers has now designed and submitted to the FDA, under Emergency Use Authorization (EUA), a ventilator made out of a bag valve mask (aka Ambu-Bags) and readily available electronics, actuators, and motors. Bag valve masks are themselves found near every hospital bed in case emergency oxygenation is necessary, so they should be in sufficient supply already.
https://www.medgadget.com/2020/03/mit-emergency-ventilator-submitted-for-fda-review.html
