During the 2002 Olympics we also used the What's Strange About Recent Events (WSARE 1.0) algorithm. 29 WSARE performs a heuristic search over combinations of temporal and spatial features to detect anomalous densities of cases in space and time. Such features include all aspects of recent patient records, including syndromal categories, age, gender, and geographical information about patients. The criteria used in the past for sending a WSARE 1.0 alert was that there has been an increase in the number of patients with specific characteristics relative to the counts on the same day of the week during recent weeks and the p-value after careful adjustment for multiple testing for the increase was #0.05. Version 3.0 of WSARE, which will incorporate a Bayesian model for computing expected counts rather than using unadjusted historical counts currently, is under development.