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Researcher working in a biosafety level 4 laboratory

Research inside a biosafety level 4 work station shows researcher wearing airtight, pressurized suit. The suits have dedicated life-support systems that include redundant breathing air compressors, alarms and emergency backup air tanks, and a HEPA air filtration system.

Credit: U.S. Army Medical Research Institute of Infectious Diseases

Last Updated May 17, 2010

Last Reviewed May 17, 2010