Class I biological safety cabinets:
a. sterilize the air as it passes over the ma-terial in the cabinet.
b. protect the environment from contamina-tion by biological agents by filtering the air as it is exhausted from the cabinet.
c. are completely enclosed and have gloves that enable the worker to manipulate the material in the cabinet.
d. are often called laminar flow hoods.
B
Biological safety cabinets are designated by class according to the degree of biological contain-ment they provide, from the lowest level of containment (class I) to the highest level of contain-ment (class III).
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