One of the tragedies of the coronavirus crisis is the lack of protection for healthcare workers: With a shortage of N95 masks—the respirators that can help filter out virus-filled droplets from coughs or sneezes—doctors and nurses in the U.S. are begging the government to do more to increase production. In Italy and China, thousands of doctors were infected with COVID-19 in part because they didn’t have masks, gloves, or other protection. Many have died.