Ventilator manufacturers aren't impressed by Elon Musk's offer

In the face of a projected national shortage, Tesla CEO Elon Musk has offered to manufacture life-saving ventilators. There's just one problem: The companies actually making medical ventilators today don't think he can pull it off. 
As the coronavirus pandemic continues to ravage the world, officials around the U.Shave warned that, unless drastic measures are taken to create more, will we see demand for ventilators exceed the current supply. When, and if, this happens depends on numerous ha