Answer :
Final answer:
The three classes of Biological Safety Cabinets or BSCs are Class I, Class II, and Class III which provide various levels of protection against biological agents in laboratory settings. Class I protects from low to moderate risk, Class II uses air flow systems and barriers to contain infectious agents, while Class III is designed for working with highly infectious agents using a sealed gas-tight setting.
Explanation:
The question is asking about the three types of SCIFs, but the provided information appears to be related to BSCs (Biological Safety Cabinets). The three classes of BSCs are Class I, Class II, and Class III. Class I BSCs are designed to protect laboratory personnel and the environment from a low to moderate risk of exposure to biological agents used in the laboratory by drawing air into the cabinet and filtering it before exhaust. Class II BSCs employ a system of directional air flow and partial barriers to contain infectious agents. Class III BSCs are intended for working with highly infectious agents and utilize a sealed, gas-tight design. All materials entering or exiting the Class III cabinet must be passed through a double-door system, ensuring space to be decontaminated between uses. The contained air is filtered and incinerated before being directly exhausted outdoors.
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