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In March, as COVID-19 was spreading rapidly, and the lives of Americans were turned upside down, the country was deeply worried about ventilators. There did not seem to be enough of the breathing machines to treat the gravely ill. In response, in April the U.S. government allocated nearly $3 billion to build more than 135,000 ventilators and add them to the Strategic National Stockpile by the end of 2020. But even if all those extra ventilators had been on hand in the spring, a group of medical experts recently argued in JAMA, the machines would probably not have meaningfully improved survival rates, because once patients were sick enough to need them, many died anyway (although mortality rates for these patients have been revised downward).
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