Table 1. Baseline characteristics.
| Characteristic | Frequency (%) | |
|---|---|---|
| Gender | ||
| Male | 48 (24.0) | |
| Female | 151 (75.5) | |
| Unknown | 1 (0.5) | |
| Age (yr) | ||
| 12–55 | 127 (63.5) | |
| >55 | 73 (36.5) | |
| Vaccine | ||
| Pfizer-BioNTech | 182 (91.0) | |
| Moderna | 13 (6.5) | |
| Janssen | 5 (2.5) | |
| Local reaction | 17 (8.5) | |
| Erythema at the injection site | 1 (5.9) | |
| Pruritus at the injection site | 1 (5.9) | |
| Pain at the injection site | 10 (58.8) | |
| Reaction at the injection sitea) | 5 (29.4) | |
| Systemic reaction: top 10 systemic reaction | 200 (100.0) | |
| Fatigue/asthenia | 78 (39.0) | |
| Pyrexia/increased body temperature | 59 (29.5) | |
| Headache | 71 (35.5) | |
| Pain (general)/pain in extremity/myalgia | 63 (31.5) | |
| Chills | 63 (31.5) | |
| Arthralgia/joint swelling/joint stiffness/joint range of motion decreased/musculoskeletal stiffness | 28 (14.0) | |
| Dizziness | 22 (11.0) | |
| Nausea | 20 (10.0) | |
| Peripheral swelling/eye swelling/face swelling/ pharyngeal swelling/oedema/lip swelling/swelling | 15 (7.5) | |
| Feeling abnormally/hot or cold | 12 (6.0) | |
Data extracted from the Vaccine Adverse Event Reporting System database [4].
a)Injection or vaccination site reaction included multiple parameters (i.e., pruritus, pain, swelling, redness, bruising, warmth, irritation, and/or erythema).