As the coronavirus spreads, the collapse of the project helps explain America’s acute shortage.

The plan was to build a large fleet of inexpensive portable devices to deploy in a flu pandemic or another crisis.

Money was budgeted. A federal contract was signed. Work got underway.

And then things suddenly veered off course. A multibillion-dollar maker of medical devices bought the small California company that had been hired to design the new machines. The project ultimately produced zero ventilators...

As the coronavirus spreads, the collapse of the project helps explain America’s acute shortage.

The plan was to build a large fleet of inexpensive portable devices to deploy in a flu pandemic or another crisis.

Money was budgeted. A federal contract was signed. Work got underway.

And then things suddenly veered off course. A multibillion-dollar maker of medical devices bought the small California company that had been hired to design the new machines. The project ultimately produced zero ventilators...