The essential elements of the four
biosafety levels for activities involving infectious microorganisms and
laboratory animals are summarized in Table1 and Table1a.
The levels are designated in ascending order, by degree of protection
provided to personnel, the environment, and the community.
The following links will provide you with a more elaborate description
of the necessary requirement and condition under which work may be
conducted per biosafety level.
Biosafety Levels for Work with Infectious