Author: Lazarus, Ross; Yih, Katherine; Platt, Richard
Title: Distributed data processing for public health surveillance Document date: 2006_9_19
ID: 1fu1blu0_5
Snippet: To support the National Demonstration Bioterrorism Surveillance Program (NDP), we developed a system in which no PHI leaves the immediate control of the data provider, and only aggregate data is transferred to the datacenter [2, 5] . Each data provider performs initial aggregation of the PHI within their own existing, secured data processing environment, producing data that is aggregated beyond the point where any individual patient is identifiab.....
Document: To support the National Demonstration Bioterrorism Surveillance Program (NDP), we developed a system in which no PHI leaves the immediate control of the data provider, and only aggregate data is transferred to the datacenter [2, 5] . Each data provider performs initial aggregation of the PHI within their own existing, secured data processing environment, producing data that is aggregated beyond the point where any individual patient is identifiable. Since data processing is distributed to the site of data collection rather than being performed at one central location, we describe this as a distributed processing surveillance system. Although this particular aspect of our work has briefly been mentioned in previous publications [1, 2, [4] [5] [6] , we present it in greater detail here, because we believe that it represents a potentially valuable alternative surveillance system design option that deserves more explanation and wider debate than it has received to date.
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