Basic Biological Safety – Principles and Practices
Risk Group 4 – Biosafety Level 4 (BL4)
Agents assigned to this BSL are dangerous and exotic with a high individual risk of life-threatening disease and which may be transmitted via the aerosol route. Vaccinations or therapies are not available for these agents.
- Ebola virus
- Herpes B virus (Cercopithecine)
- Lassa fever virus
Features of BL – 4
Personnel perform work in full-body positive pressure protective gear or in Class III glove boxes. A separate facility specifically designed to protect the surrounding environment are required as well.
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Updated November 27, 2007 by SAK