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. 2023 May 24;13:8416. doi: 10.1038/s41598-023-35471-3

Table 1.

Characteristics of the study cohorts and serum sampling intervals.

Children COVID-19 vaccinated HCWs
N 140 113
Female (%) 66 (47%) 104 (92%)
Male (%) 74 (53%) 9 (8%)
Months Years
Age 1st sampling (mean and range) 13.7 (11.6–16.6) 43 (25–65)
Age 2nd sampling (mean and range) 25.3 (23.8–27.4)
Age 3rd sampling (mean and range) 37.5 (36.1–39.6)
Sampling interval Months Months
Time between 1st and 2nd sample 11.6 (7.8–14.7) 2.3 (1.3–6.2)
Time between 2nd and 3rd sample 12.1 (10.3–14.6) 8.5 (7.5–10.5)