What defines a BSL-2 facility and its basic features?

• A. Agents pose no hazards and require standard lab precautions
• B. A BSL-2 workstation requires work in open rooms with no special PPE
• C. Biological safety level 2: Agents pose moderate hazards; features include limited lab access, biosafety cabinet, PPE, training, autoclave
• D. BSL-2 uses no PPE and no special training

Answer: (C)

BSL-2 is about handling agents that pose moderate hazards and the safeguards that keep people and the environment safe. Because these organisms can cause illness if inhaled, ingested, or exposed to mucous membranes, the lab design and practices must limit exposure and prevent spread. The facility does this by restricting access to trained personnel, so only those who know the procedures can enter and work there. Work that could create aerosols or splashes is done inside a biosafety cabinet, which acts as a primary barrier between the worker and any infectious material. Personnel wear appropriate protective gear, such as lab coats, gloves, and eye or face protection, to add a protective layer against contact or splashes. Ongoing safety relies on proper training and supervision to ensure everyone follows the protocols, and on equipment for decontamination, typically an autoclave, to render waste harmless before disposal. The combination of limited access, a biosafety cabinet for risky procedures, personal protective equipment, formal training, and waste decontamination defines the level and its basic features. Other options describe scenarios with no hazard or no protective measures, which don’t fit the requirements of a BSL-2 setting.