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Statue of the Turkish Folkloric Figure Nasreddin Hoca, who looked for his keys in a well-lit place because it was too dark to look for them where they were. Photo shows a statue of the famous figure riding backward on a donkey. GETTY Images/Corbis/Chris Hellier

Global Health Needs a New Approach to Evidence Grading

by Luke Shors, Amit Chandra

COVID-19 crisis highlights how some important questions have to be answered without the benefit of experimental studies