Table 1.
Age, sex, vaccination, and SARS-CoV-2 infection history of the migrant workers.
| Characteristics | All workers (n=675) |
|---|---|
| Mean age (SD) | 32 (7.44) |
| Age category (year) | n (%) |
| 18-40 | 588 (87.11) |
| 41-51 | 87 (12.89) |
| Sex | |
| Male | 675 (100) |
| Different COVID-19 vaccines received by the workers | |
| Sinopharm (BBIBP-CorV) | 224 (33.19) |
| Pfizer (Comirnaty) | 188 (27.85) |
| Moderna (Spikevax) | 174 (25.78) |
| AstraZeneca (Covishield) | 85 (12.59) |
| Mixed vaccine (S/M/P) * | 4 (0.59) |
| Number of vaccine doses received by the workers | |
| Single dose | 75 (11.11) |
| Double dose | 584 (86.52) |
| Booster dose | 16 (2.37) |
| Past SARS-CoV-2 infection | |
| Yes | 94 (13.93) |
| No | 581 (86.07) |
| Frequency of reported past infection | |
| Once | 94 (100) |
| Duration of reported past infection | Median (IQR) |
| Month | 6 (16) |
| Time differences between last vaccination and blood collection for COVID-19 sero-survey (Day) collection for COVID-19 sero-survey (Day) |
Median (IQR) |
| Overall | 106 (101.50) |
| Single dose recipients | 32 (208.50) |
| Double dose recipients | 109 (92.30) |
| Booster recipients | 90 (66.80) |
*Spikevax plus Comirnaty and Comirnaty plus Covishield for double dose vaccine recipients; (Spikevax plus BBIBP-CorV and BBIBP-CorV) and (BBIBP-CorV plus BBIBP-CorV and Comirnaty) for booster dose vaccine recipients.