Table 1.

Characteristics of study subjects.

	Healthy controls	CCP-donors
	(n = 55)	(n = 65)
Age, y, median (range)	50 (24–68)	48 (21–63)
Sex, F / M, n (%)	10 (18) / 45 (82)	29 (45) / 36 (55)
T-cells, cells/uL, median (range)	1121 (685–2009)	1132 (454–2238)
SARS-CoV-2 IgG, ratio, median (range)	0.2 (<0.1–0.6)	4.5 (2.2 - >12)