A biosafety level is the level of the biocontainment precautions required to isolate dangerous biological agents in an enclosed facility. The levels of containment range from the lowest biosafety level 1 (BSL-1) to the highest at level 4 (BSL-4). In the United States, the Centers for Disease Control and Prevention (CDC) have specified these levels. In the European Union, the same biosafety levels are defined in a directive.
Read more about Biosafety Level: History, Rationale, List of BSL-4 Facilities
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“There is only one honest impulse at the bottom of Puritanism, and that is the impulse to punish the man with a superior capacity for happinessto bring him down to the miserable level of good men i.e., of stupid, cowardly and chronically unhappy men.”
—H.L. (Henry Lewis)