Table 1.

% Residual IgG anti-S-RBD reactivity. Each cell reports the numbers of individuals considered for the analysis, the number of individuals excluded from the analysis since the reactivity at the last timepoint was still higher and the descriptive statistics expressed as median and interquartile (IQR).

%Residual IgG anti-S-RBD reactivity
Baseline
Anti-S-RBD IgG BAU/mL	90%	75%	50%	25%	10%
All individuals
N considered	1013	1013	1013	1013	1013
N excluded	19	39	99	257	515
Days	11.1 (9.5–14.6)	27.7 (23.6–35.4)	55.6 (47.6–68.9)	84.1 (74.4–104.1)	119.9 (97.5–153.1)
> 2000
N considered	342	342	342	342	342
N excluded	2	4	9	40	117
Days	11.1 (9.5–14.0)	27.7 (23.8–34.8)	55.1 (47.6–68.2)	82.6 (71.8–100.6)	116.7 (95.1–149.4)
1000–2000
N considered	232	232	232	232	232
N excluded	2	5	7	26	101
Days	11.2 (9.9–13.0)	27.8 (24.5–32.3)	55.8 (49.9–64.6)	84.7 (76.4–97.5)	120.1 (99.9–145.9)
500–1000
N considered	194	194	194	194	194
N excluded	2	2	8	44	89
Days	11.4 (9.9–14.5)	28.5 (24.7–36.4)	58.3 (49.7–72.5)	87.5 (76.2–110.7)	121.1 (97.0–157.7)
100–500
N considered	191	191	191	191	191
N excluded	8	18	44	101	155
Days	11.0 (7.9–16.2)	26.2 (18.9–37.4)	52.7 (36.6–71.0)	89.4 (71.5–112.1)	138.5 (112.7–165.6)