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SARS-CoV-2-specific IFN-γ-producing T cell CD4+ (red) and CD8+ (blue) T cell counts (A) and proportion of patients with detectable (≥0.1%) responses (B) by the ICS method according to the time interval from the diagnosis of COVID-19 to the assessment. Horizontal bars and whiskers represent median values and interquartile ranges, respectively. IFN-γ, interferon-γ; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2
