Which level of biohazard suggests stringent access control and decontamination procedures?

The designation of BSL-3 corresponds to a level of biohazard that mandates strict access control and comprehensive decontamination protocols due to the pathogens handled at this level. BSL-3 laboratories work with agents that can cause serious or potentially lethal diseases through inhalation. As such, they require specialized facilities and safety measures, including controlled access, decontamination of laboratory surfaces and equipment, and the use of personal protective equipment (PPE) for individuals working within these spaces.

In BSL-3 labs, there are requirements for double-door access to ensure that unauthorized personnel cannot enter, and to prevent pathogens from escaping the lab environment. It is also essential that air flow systems are designed to prevent any contaminants from leaving the facility, often employing filtration systems such as HEPA filters. These stringent measures reflect the inherent risks associated with the pathogens dealt with at this biosafety level, underscoring the focus on both containment and protection of laboratory workers and the surrounding environment.

This level of biohazard control is not typically found in BSL-1 or BSL-2 facilities, which handle less hazardous materials. BSL-1 involves minimal risk agents, while BSL-2 deals with moderate-risk agents where basic safety practices suffice without the