TABLE 1.

Study participants. V1 < 3‐month recovery due to the proximity to the arrival of the SARS‐CoV‐2 virus in Europe in January 2020 ‐ WHO situation reports [42], V2 (6–9‐month recovery), V3 (9–12 months recovery). No individuals were vaccinated at the time of study participation

PBMC collection visit	Number of participants	IgG positive	IgG positive
			<20‐year old	20–39‐year old	40–59‐year old	>60‐year old
V1	730	154	14	45	65	30
V1 + V2	236	62	7	11	35	9
V1 (+/− V2) + V3	161	43	5	7	25	6