Table 3. Frequency of cases and controls by age-group.
| Age/years | <1–9 | 10–19 | 20–29 | 30–39 | 40–49 | 50–59 | ≥60 |
| DF | 6 | 33 | 16 | 3 | 4 | 7 | 4 |
| DHF | 2 | 3 | 2 | 0 | 3 | 2 | 3 |
| Total | 8 | 36 | 18 | 3 | 7 | 9 | 7 |
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