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FILE - A health worker administers a dose of a Moderna COVID-19 vaccine during a vaccination clinic in Norristown, Pa., Tuesday, Dec. 7, 2021. Moderna on Thursday, April 28, 2022, asked U.S. regulators to authorize low doses of its COVID-19 vaccine for children younger than 6, a long-awaited move toward potentially opening shots for millions of tots by summer.(AP Photo/Matt Rourke, File)The research, based on data collected from nearly 10,000 adults, took a major step toward defining key symptoms of the lingering ailment -- such as fatigue, brain fog, loss of taste and smell -- a crucial step in helping patients and their doctors better understand the long-term effects of COVID.
Originally published at Harriet Blair Rowan, Associated Press