| 1) Completeness of reporting
The number of reports received divided by the number of reports expected, expressed as a percentage. If the completeness of reports was only 50%, then the disease incidence would be under-reported by 50%.
2) Timeliness of reporting
The number of reports received on time divided by the number of reports expected expressed as a percentage. The definition of 'on time' must be clear to reporting units.
3) Description by time, place and person (when, where and who gets the disease?)
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