Figure 1.
![T-cell recognition of SARS-CoV-2 viral antigens. Specificity of the expanded cells in response to SARS-CoV-2 antigens from convalescent patients (n = 46) and unexposed controls (n = 15) was assayed by IFN-γ ELISpot assay (bars = median). Unstimulated T cells (control [CTL] only) and stimulation with actin were used as negative controls. Results are presented as spot-forming units (SFC) per 1 × 105 cells. Specificity was defined as ≥20 spots per well with significance above background (actin) via 2-tailed Student t test. *P = .0008, **P = 6.24 × 10−6.](https://ash.silverchair-cdn.com/ash/content_public/journal/blood/136/25/10.1182_blood.2020008488/1/bloodbld2020008488f1.png?Expires=1735825385&Signature=rsQ7Ho6MLf2moFklrfjHzc2wylNra9KWGZrqAv5~QyddhrnXiOAYHlBQQ2Oo7Vdc1vXuG5Cv1K7Jyqak5ywjyU~JEWYyx1vYmiioDcqn-ShCKX5pJyMhP35jpl~-d7cjadmA~4XMY~ZQb08R5ZyaY1LKxv2F6EdbpoEPs7bXJasEYRD0fhKICr96IQjeXLHg1szEWCj2aDzHY6nj1iCNbmMsmByH~0lfq2qcUQtgNHCCCEkucnSG~44nGbP2AYtuOCr6zQSDKayxYhckOV3Dh2xR7jLx3WJFFqo~OKfwy0gdghzg6KcFbz5~C1oCIazPHO9mT129qA6GyrnjMryjXw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
T-cell recognition of SARS-CoV-2 viral antigens. Specificity of the expanded cells in response to SARS-CoV-2 antigens from convalescent patients (n = 46) and unexposed controls (n = 15) was assayed by IFN-γ ELISpot assay (bars = median). Unstimulated T cells (control [CTL] only) and stimulation with actin were used as negative controls. Results are presented as spot-forming units (SFC) per 1 × 105 cells. Specificity was defined as ≥20 spots per well with significance above background (actin) via 2-tailed Student t test. *P = .0008, **P = 6.24 × 10−6.