FILE - This is an April 30, 2020, file photo showing Gilead Sciences headquarters in Foster City, Calif. A California biotech company says its experimental drug remdesivir improved symptoms when given for five days to moderately ill, hospitalized patients with COVID-19. Gilead Sciences gave few details on Monday, June 1, 2020, but said full results would soon be published in a medical journal. (AP Photo/Ben Margot, File)
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