Biosafety Levels 1, 2, 3 & 4

Biological safety levels are ranked from one to four and are selected based on the agents or organisms on which the research or work is being conducted. Each level up builds on the previous level, adding constraints and barriers.
Each biological safety level builds on the previous level, adding constraints and barriers based on the agents or organisms in which the research or work is being conducted. 

What are Biosafety levels? – Amino Labs

Biosafety Levels 1, 2, 3 & 4

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