Table 1.
Characteristics of the healthcare workers.
| Overall | No SARS-CoV-2 infection | SARS-CoV-2 infection | P | |
|---|---|---|---|---|
| n | 6674 | 6506 | 160 | |
| Age (years) | 39 [29–49] | 39 [29–49] | 34 [26–47] | 0.015 |
| Follow-up (months) | 7.0 [6.3–8.0] | 7.0 [6.4–8.0] | 5.5 [3.2–6.6] | <0.001 |
| Vaccination strategy | ||||
| Type of vaccine* | 0.244 | |||
| BNT162b2 | 2426 (36) | 2353 (36) | 70 (44) | |
| mRNA-1273 | 1931 (29) | 1886 (29) | 42 (27) | |
| Mixed mRNA | 44 (1) | 42 (1) | 1 (1) | |
| ChAdOx1 nCoV-19 | 50 (0.7) | 40 (0.8) | 0 (0) | |
| Mixed schemes including ChAdOx1 nCoV-19 | 2219 (33) | 2173 (33) | 45 (29) | |
| Delay from complete vaccination to SARS-CoV-2 infection (months) | – | – | 5.5 [3.2–6.6] | |
| COVID-19 waves | ||||
| Third wave | – | – | 9 (6) | |
| Fourth wave | – | – | 49 (31) | |
| Fifth wave | 102 (64) | |||
| Symptoms | – | – | 145 (91) | |
| Headache | – | – | 97 (61) | |
| Cough | – | – | 94 (59) | |
| Thrill | – | – | 55 (35) | |
| Fever | – | – | 52 (33) | |
| Aches | – | – | 62 (39) | |
| Sore Throat | – | – | 76 (48) | |
| Nasal discharge | – | – | 76 (45) | |
| Rhinorrhee | – | – | 114 (72) | |
| Anosmia/agueusia | – | – | 59 (37) |
Data are reported as numbers with percentage for qualitative variables or median with interquartile interval for quantitative variables.
*Vaccine schemes were defined as follows: ‘BNT162b2′ for administration of two doses of BNT162b2 vaccine, ‘mRNA-1273′ for two doses of mRNA-1273 vaccine, ‘mixed mRNA’ for one dose of BNT162b2 and one dose of mRNA-1273 vaccines, ‘ChAdOx1 nCoV-19′ for two doses of ChAdOx1 nCoV-19 vaccines and ‘schemes including ChAdOx1 nCoV-19′ for one dose of ChAdOx1 nCoV-19 vaccine and the other with BNT162b2 or mRNA-1273 or ChAdOx1 nCoV-19 vaccines.