AbstractIn 2020, the coronavirus pandemic killed 1,800,000 people, 346,000 of them Americans. In that same year, if recent estimates are correct, about the same number died as a result of medical errors, all despite the enormous effort of the past 20 years to eliminate preventable harm, an effort that has involved people at all levels: policy makers, government agencies, oversight bodies, quality improvement organizations, major health-care systems, and thousands of providers and caregivers on the frontline.