Table 1 Characteristics of enrolled healthy donors (percentage relative to the numbers are shown in the parentheses in italic)
|  | Young (n = 26) | Older adults (n = 26) |
|---|---|---|
Age (years) | Â | Â |
Mean ± SD | 28 ± 4 | 68 ± 4 |
Range | 21–35 | 60–78 |
Gender n (%) | Â | Â |
Female | 13 (50) | 13 (50) |
Male | 13 (50) | 13 (50) |
Disease n (%) | Â | Â |
Cardiovascular (i.e., hypertension, atrial fibrillation) | 0 (0) | 4 (15) |
Diabetes mellitus | 0 (0) | 2 (7) |
Hypothyroidism | 0 (0) | 4 (15) |
Flu-like symptoms post-vaccination n (i.e., mucus, fever, allergic symptoms, mild bronchitis, redness in the site of vaccination) (%) | 4 (14) | 7 (26) |