The Department of Homeland Security’s (DHS’s) Bio Watch program aims to provide an early indication of an aerosolized biological weapon attack. The first generation of Bio Watch air samplers were deployed in 2003. The current version of this technology, referred to as Generation 2 (Gen-2), uses daily manual collection and testing of air filters from each monitor, a process that can take 12 to 36 hours to detect the presence of biological pathogens. Until April 2014, DHS pursued a next-generation autonomous detection technology that aimed to shorten the time from sample collection to detection to less than 6 hours, reduce the cost of analysis, and increase the number of detectable biological pathogens. Because of concerns about the cost and effectiveness of the proposed Generation 3 system (Gen-3), DHS cancelled its acquisition plans for the next-generation surveillance system. In response to the cancellation announcement, Congress asked the Government Accountability Office (GAO) to conduct a review of the program and the proposed system enhancements that would have been incorporated in Bio Watch Gen-3. However, Mike Walter, Bio Watch Program manager, Office of Health Affairs, DHS, said that DHS did not agree with all of GAO’s characterizations of the Bio Watch program efforts described in this review. In response to this, DHS requested that the National Academies of Sciences, Engineering, and Medicine conduct a workshop to further explore the findings of the 2015 GAO report and discuss the impact these findings may have with regard to the future development of the technical capabilities of the Bio Watch program. Workshop participants also discussed existing and possible collaborations between Bio Watch, public health laboratories, and other stakeholders that could contribute to the enhancement of biosurveillance capabilities at the federal, state, and local levels. This publication summarizes the presentations and discussions from the workshop.
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