From:  Durability of SARS-CoV-2 IgG response: a cross-sectional study in vaccinated healthcare workers using dried blood spot and multi-antigen profiling

Characteristics of the study participants

                                                         ProfileNumber (n = 103)(%)
Age (years)≤ 40           9087.38
> 40           1312.62
GenderMale           4240.78
Female           6159.22
Body mass indexUnderweight           21.94
Normal           2625.24
Overweight           2827.18
Obesity class 1           3332.04
Obesity class 2           1413.59
OccupationDoctor           3433.01
Nurse           5856.31
Other           1110.68
Work unitIntensive care unit           2019.42
Emergency room           2524.27
Ward           1918.45
Policlinic           1918.45
Operation room           2019.42
COVID-19 historyInfected           7370.87
Non-infected           3029.13
Vaccination frequency (times)2           54.85
3           7976.70
4           1918.45
Duration (months)6–12           65.83
13–18           1615.53
18–24           3332.04
25–31           4846.60
Vaccine combination2 Inactive - 2 mRNA           1413.59
2 Inactive - mRNA           7875.73
Others           1110.68
Vaccine statusFull-Infected           109.71
Full-Non Infected           98.74
Not Full-Infected           6361.17
Not Full-Non Infected           2120.39
IgG antibodySeropositive           10299.03
Seronegative           10.97
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IgG: Immunoglobulin G; mRNA: messenger RNA; Full-Infected: vaccinated 4 times and confirmed COVID-19; Full-Non Infected: vaccinated 4 times and not confirmed COVID-19; Not Full-Infected: < 4 vaccinations and confirmed COVID-19; Not Full-Non Infected: < 4 vaccinations and not confirmed COVID-19