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=1721563964&Signature=17oFbbI25XNiMH9nlJuMFDmpNjbG0Bo~e2HxsHsmiXy02r02XX8CqoMQmedciWNjtwmzqi6NGHTHedC-ouQiqjXGZo0SaFeSgFbehuP194MtSj5bCvud2sI7SPMIgT0dMc~ueXkPMV1mNJFy-s7olgg6z1pF7OwssG84zWpB~HavRFh4FgXVGDXrhjtvETdprTWGWiLCmc6Q1eZJB4oNVm5rRk7xrFR9teEjqT8JBF1svrW8~tPCiYgL89t7TfPOXIo1lE2GcdkaSxV28Utv4K1wKtqdUmXe1WbIqmKNS5Yf4gWtye8NbKeyHi7MznisyYXhW6O0namszteaLCAY4A__&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.