Shortage

2010 survey reported U.S. hospitals had 62,188 full-featured mechanical ventilators on hand, but the numbers varied widely by state - [1]
Doctors decide selection criteria for allocating limited medical equipment - [2]. Sadly - “This is a shift to caring for the population, where you look at the whole population of people who need care and make a determination about who is most likely to survive, and you provide care to them,” she said. “Those that have a less good chance of survival — but still have a chance — you do not provide care to them, which guarantees their death.”
Most severe cases require ICU care, of which there are 200k beds in the USA.
The Johns Hopkins Center for Health Security estimates that 38 million Americans will need medical care for COVID-19, including as many as 9.6 million who will need to be hospitalized – about a third of whom might need ICU-level care. In a February presentation to the American Hospital Association, Lawler estimated that as many as 96 million Americans could be infected. - from 'https://www.usatoday.com/in-depth/news/investigations/2020/03/13/us-hospitals-overwhlemed-coronavirus-cases-result-in-too-few-beds/5002942002/'

Efforts

1 Million Ventilators - is this an open source project? https://helpwithcovid.com/projects/13-1-million-ventilators
See other efforts at [3]
Incentive challenge at Ennomotive - [4]
Other efforts listed by Ennomotive - [5]