Table 3.
Effects of vaccination on long COVID symptoms.
| Long COVID Symptom | The Number of Studies | The number of People | I2 (%) | RR (95% CI) | p Value of Meta-Analysis |
|---|---|---|---|---|---|
| Anxiety and/or depression | 4 | 28,604 | 70 | 0.83 (0.67–1.03) | 0.08 |
| Chest or throat pain | 3 | 26,386 | 0 | 1.01 (0.95–1.08) | 0.67 |
| Cognitive dysfunction/symptoms | 2 | 22,124 | 8 | 0.89 (0.83–0.96) | <0.01 |
| Fatigue | 6 | 225,478 | 97 | 0.77 (0.58–1.02) | 0.07 |
| Hair loss | 2 | 6480 | 50 | 0.86 (0.62–1.19) | 0.37 |
| Headache/migraine | 4 | 76,836 | 99 | 0.95 (0.50–1.79) | 0.87 |
| Kidney diseases/problems | 2 | 148,365 | 0 | 0.68 (0.64–0.73) | <0.01 |
| Loss of concentration | 2 | 6480 | 71 | 0.65 (0.35–1.19) | 0.16 |
| Loss of smell | 3 | 8698 | 75 | 0.67 (0.36–1.26) | 0.21 |
| Loss of taste | 3 | 8698 | 68 | 0.71 (0.48–1.07) | 0.10 |
| Myalgia | 2 | 25,435 | 15 | 0.68 (0.62–0.74) | <0.01 |
| Nausea and/or vomiting | 2 | 6480 | 87 | 0.80 (0.31–2.02) | 0.63 |
| Respiratory symptoms/sequelae | 5 | 78,064 | 98 | 0.91 (0.60–1.40) | 0.68 |
| Sleeping disorders/problem sleeping | 3 | 8698 | 25 | 0.74 (0.64–0.86) | <0.01 |
| Weight loss | 2 | 6480 | 95 | 1.24 (0.22–7.05) | 0.81 |