| Age (years) | RVD STATUS | ||
| Negative | Positive | Total | |
| 1 - 10 | 1 | 5 | 6 |
| 11 - 20 | 20 | 3 | 23 |
| 21 - 30 | 59 | 12 | 71 |
| 31 - 40 | 34 | 15 | 49 |
| 41 - 50 | 16 | 20 | 36 |
| 51 - 60 | 16 | 5 | 21 |
| 61 - 70 | 10 | 1 | 11 |
| 71 - 80 | 3 | 0 | 3 |
| >80 | 2 | 0 | 2 |
| Total | 171 | 51 | 222 |