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=1722385093&Signature=zMc8Kw3tFjHMktTNTspCM9p5yqJSEFBke5RoXkuvE4IN11OUvkhYSlra~~4nG~0ws6pA5EMLu8y7SxH4F9Z1uM5jop9iYbwKsQZnAnjLbFd8uEUd3fJntfHcye1IsSQBgtaUXTlylVQ4aHCMEX52qsNPPy3VaTJI8ZZqSG~-yJ6Jlc-aj2U01WEMgVD3KS0UvvHk5k41P-OWnohFPUmW6V5J40C3kJzi0EWTVJFlquXn~U8EfP7sngb2~UKWoIkM6emdS0sii5UlsjYJKvvPc6ObCgTFdMi-8m61dgqZZA1QWuPes5hO0JB3sdcpRdathcCl2hxwI6ZR6kDmCF~cmQ__&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.