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In this Feb. 20, 2020, photo, a view of the AstraZeneca logo, on a building, in South San Francisco, Calif. As the race for a vaccine against the coronavirus intensifies, many rich countries are rushing to the front of the line by placing advance orders for the inevitably limited supply to guarantee their citizens are immunized first. Britain and the U.S., meanwhile, have each sunk millions of dollars into various vaccine candidates, including one being developed by Oxford University and manufactured by AstraZeneca. (AP Photo/Jeff Chiu)