Table 3.

Results of antibody response following vaccination in Health Care Workers: titer of neutralizing antibodies expressed as median (25th, 75th percentiles) (in BAU/mL) according to participant characteristics (at baseline) and date of sample collection regarding the vaccine injection.

	D0–D14	D15–D29	D30–D44	D45–D59	D60–D74	D75–D90
All HCW
1st injection	<4.81 (<4.81, 31)/72	236 (70, 573)/55	168 (75, 267)/39	84 (36, 133)/29	77.8 (37.5, 122)/41	74 (39, 117)/26
2nd injection	1950 (219, >2080)/89	>2080 (2038, >2080)/64	>2080 (1880, >2080)/63	>2080 (1570, >2080)/55	1475 (889, >2080)/46	1400 (876, 1925)/91
Women HCW
1st injection	<4.81 (<4.81, 26.5)/59	236 (53.6, 583.5)/47	168 (87.9, 358)/33	95.4 (36.7, 133)/25	70.6 (37.4, 131)/35	79.4 (55.1, 136)/22
2nd injection	1655 (175.8, >2080)/76	>2080 (2037, >2080)/52	>2080 (1880, >2080)/52	>2080 (1585, >2080)/44	1520 (905, >2080)/40	1450 (884, 1960)/76
Men HCW
1st injection	6.9 (<4.81, 137)/13	259.5 (159.2, 418.2)/8	126.8 (61.4, 185.5)/6	42 (31, 82.9)/4	91.1 (88.8, 100.4)/6	32.4 (30.8, 33.6)/4
2nd injection	>2080 (776, >2080)/13	>2080 (1973, >2080)/12	2030 (1785, >2080)/11	1780 (1475, >2080)/11	1250 (929, 1922.5)/6	1060 (801.5, 1690)/15
HCW aged 40 y and over
1st injection	<4.81 (<4.81, 31.7)/38	236 (93, 449)/33	183 (112.7, 243.2)/20	38 (34.2, 95.4)/9	74.2 (43.9, 143.8)/14	73.5 (41.1, 80.6)/9
2nd injection	1800 (269.2, >2080)/44	>2080 (1620, >2080)/37	>2080 (1620, >2080)/41	1740 (1420, >2080)/27	976 (577, 1605)/19	1150 (763, 1800)/41
HCW younger than 40 y
1st injection	<4.81 (<4.81, 25.1)/34	370.5 (52.4, 931.8)/22	143 (59, 310)/19	106 (40.5, 187.2)/20	82.1 (37.4, 101.5)/27	78.3 (36.9, 139)/17
2nd injection	1950 (175, >2080)/45	>2080 (>2080, >2080)/27	>2080 (2048, >2080)/22	>2080 (1710, >2080)/28	1890 (1435, >2080)/27	1550 (986.8, >2080)/50

HCW: health care workers, n: number of available serological titers.