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Post-acute sequelae of SARS-CoV-2 infection (PASC) patient exhibits persistent SARS-CoV-2 antigen positivity in nasopharynx. (A) Study visit timeline, including vaccination, infection, and intervention dates. (B) FlowFlex™ SARS-CoV-2 antigen test results over time. Time p.i., weeks post-infection. (C) PASC symptoms vs. rheumatoid arthritis symptoms.
