Biosafety Level 3 includes __________:
a. Double sets of entry doors
b. Pressurized suits
c. Showers in entryways
d. All of the above

Verified step by step guidance

1. Understand that Biosafety Levels (BSL) are a series of protections designed to contain dangerous biological agents in laboratories, ranging from BSL-1 (lowest risk) to BSL-4 (highest risk).
2. Recall that BSL-3 laboratories are designed to work with microbes that can cause serious or potentially lethal diseases through inhalation, requiring specific engineering and procedural controls.
3. Identify the typical features of BSL-3 labs, which include controlled access, directional airflow, and specialized personal protective equipment, but do not usually require pressurized suits (which are characteristic of BSL-4).
4. Recognize that BSL-3 labs often have double sets of entry doors to maintain containment and may have showers in entryways for decontamination purposes.
5. Conclude that among the options given, double sets of entry doors and showers in entryways are part of BSL-3, but pressurized suits are not, so the correct answer is not 'all of the above'.

Key Concepts

Biosafety Levels (BSL)

Biosafety Levels are a series of protections designed to contain infectious agents in laboratories. They range from BSL-1 (lowest risk) to BSL-4 (highest risk), with each level requiring specific safety practices, equipment, and facility design to prevent exposure.

Features of Biosafety Level 3 (BSL-3)

BSL-3 labs handle pathogens that can cause serious or potentially lethal diseases via inhalation. Key features include controlled access, double sets of self-closing doors, directional airflow, and specialized ventilation to protect personnel and the environment.

Personal Protective Equipment and Facility Requirements

BSL-3 requires appropriate PPE such as lab coats, gloves, and sometimes respirators. Unlike BSL-4, pressurized suits and showers in entryways are not standard for BSL-3, which distinguishes the levels based on containment and safety measures.