Overview on biosafety

What is the concept of biosafety level?
Biosafety levels (BSL) are used to identify the protective measures needed in a laboratory setting to protect workers, the environment, and the public.
The levels are defined in Biosafety in Biomedical Laboratories (the BMBL)..
What is the overview of biosafety and biosecurity?
Whereas biosafety aims at protecting public health and environment from accidental exposure to biological agents, biosecurity deals with the prevention of misuse through loss, theft, diversion or intentional release of pathogens, toxins and any other biological materials..

What is the concept of biosafety level?