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A, Timeline of illness and treatment course. B, Computed tomography of the chest on day 67 of illness with bilateral ground glass opacities. C, Chest radiograph on day 66 of illness with bilateral hazy opacities. Abbreviations: BAL, bronchoalveolar lavage; COVID-19, coronavirus disease 2019; ELISA, enzyme-linked immunosorbent assay; IgG, immunoglobulin G; NP, nasopharyngeal; PCR, polymerase chain reaction.
