Nancy Rose, who contracted COVID-19 in 2021 and exhibits long-haul symptoms including brain fog and memory difficulties, pauses while organizing her desk space, Tuesday, Jan. 25, 2022, in Port Jefferson, N.Y. Rose, 67, said many of her symptoms waned after she got vaccinated, though she still has bouts of fatigue and memory loss. U.S. health officials estimate 3.3 million Americans have chronic fatigue syndrome — a bigger number than previous studies have suggested, and one likely boosted by patients with long COVID, according to results released by the Centers for Disease Control and Prevention on Friday, Dec. 8, 2023. (AP Photo/John Minchillo, File)