Table 2. History of COVID-19 infection and vaccination data among vaccinated population.
SD: standard deviation
| COVID-19 infection and vaccination data | Frequency | % |
| Previously had a positive test for COVID-19 | ||
| Yes | 816 | 60.9 |
| No | 524 | 39.1 |
| Type of vaccine | ||
| Pfizer/BioNTech | 909 | 67.84 |
| Oxford/AstraZeneca | 261 | 19.48 |
| Sinopharm | 170 | 12.69 |
| Number of doses of COVID-19 vaccine received | ||
| One dose | 181 | 13.51 |
| Two doses | 1030 | 76.87 |
| Three doses | 129 | 9.63 |
| Infected with COVID-19 after vaccination | ||
| Yes | 434 | 32.39 |
| No | 906 | 67.61 |
| Infected with COVID-19 after which dose | ||
| 1st dose | 142 | 32.72 |
| 2nd dose | 255 | 58.76 |
| 3rd dose | 37 | 8.52 |
| Post-vaccination side effects | ||
| Yes | 1031 | 76.94 |
| No | 309 | 23.06 |
| Duration of symptoms after vaccination (Day Mean±SD) | 2.8±1.92 | |
| Severity of side effects after vaccination | ||
| Mild | 493 | 36.79 |
| Moderate | 389 | 29.03 |
| Severe | 149 | 11.12 |
| No symptoms | 309 | 23.06 |