According to the United State Government Accountability Office (GAO) report published on October 4, 2007, a total of 1356 CDC/USDA registered BSL-3 facilities were identified throughout the United States (GAO-08-108T ). This represents a very conservative estimate of the number of facilities in the US in 2007. Approximately 36% of these laboratories are located in academia. Only 15 BSL-4 facilities were identified at the time, including 9 at federal la