Refining historical limits method to improve disease cluster detection, New York City, New York, USA.Since the early 2000s, the Bureau of Communicable Disease of the New York City Department of Health and Mental Hygiene has analyzed reportable infectious disease data weekly by using the historical limits method to detect unusual clusters that could represent outbreaks. 
the historical limits method
Refining historical limits method to improve disease cluster detection, New York City, New York, USA.Since the early 2000s, the Bureau of Communicable Disease of the New York City Department of Health and Mental Hygiene has analyzed reportable infectious disease data weekly by using the historical limits method to detect unusual clusters that could represent outbreaks. 
the historical limits method
The refined method yielded 74 signals, a 45% decrease from what the original method would have produced. 
the original method
The refined method yielded 74 signals, a 45% decrease from what the original method would have produced. 
the refined method