Charlie Stroiney

Charlie Stroiney, 8, is prepped for an MRI during a long day of testing at Children's National Hospital, in Washington, Wednesday, Jan. 26, 2022. Charlie did not have COVID-19 but her sister, Lexie, 6, did. Both are 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)