Brooklynn Chiles, 8, is examined during a followup visit at Children's National Hospital in Washington, Friday, Feb. 11, 2022, as her mother, Danielle Chiles watches at right. Brooklynn's father, Rodney Chiles, died of COVID-19 last year and she has tested positive three times. Brooklynn is part of a NIH-funded multi-year study at Children's National Hospital to look at impacts of COVID-19 on children's physical health and quality of life. (AP Photo/Carolyn Kaster)
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