Dear Knut and all, Very interesting discussion. I would like to share my thought also on how Sahana DMS included this. We had the concept of 'situation awareness' -which I think is a well agreed term in surveillance. When counts reach a certain level, it becomes an outbreak.
So, I think we may not need to introduce the data element 'outbreak', but a means to define a threshold to any data element or indicator once aggregated (eg. low hemoglobin in age group 1-14 years). In creating each data element or indicator in DHIS2, we can flag it whether its under surveillance. Also, another feature could be for the facility to set thresholds to data elements or indicators marked for surveillance. Then it can trigger notifications apart from mapping the cases on the map. Map legend would be able to provide additional visual clues whether the condition is under surveillance or reached the threshold (outbreak). 'Revers' of this process we used for inventory management. User can define re-order levels and Sahana does the estimations and sends alerts. Roshan
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