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A '''biocontainment field''' is a type of [[force field]] used for containment of infectious or hazardous materials aboard [[Federation]] [[starship]]s.   A bio-containment field would be used in [[Sickbay]] when there’s a need to keep a [[patient]] or specimen separate from the rest of the [[crew]] in case of [[Communicable Disease|contagious disease]], or when a patient requires a specific environment to live.  In [[Engineering]], it would be used for the transfer of dangerous materials or containers.  [[Science]] would use a bio-containment field for experiments where hazardous substances are being tested or used.