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Frequency of communication of results by number of surveillance system components and region
| Frequency of reporting | Africa | Asia | Europe | America | Oceania | Grand total | Percentage (%) |
|---|---|---|---|---|---|---|---|
| Irregularly/case by case | 25 | 30 | 15 | 13 | 12 | 95 | 16·18 |
| Daily or monthly | 3 | 70 | 11 | 6 | 90 | 15·33 | |
| Quarterly or twice a year | 46 | 69 | 63 | 17 | 14 | 209 | 35·60 |
| Yearly | 1 | 4 | 61 | 8 | 2 | 76 | 12·95 |
| Other/unknown | 10 | 55 | 37 | 15 | 117 | 19·93 | |
| Grand total | 85 | 228 | 187 | 59 | 28 | 587 | 100·00 |
