Noun
the level of safety from exposure to infectious agents; depends on work practices and safety equipment and facilities
Source: WordNetBut the WHO wanted more, and called for future Chinese work on SARS-related viruses to be conducted using high level virus-containment measures called Biosafety Level 3 (BSL 3). Source: Internet
Biosafety level refers to the stringency of biocontainment precautions deemed necessary by the Centers for Disease Control and Prevention (CDC) for laboratory work with infectious materials. Source: Internet