Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of BSL-4
Medically reviewed by Min Clinic Staff | Updated: January 2026
BSL-4: Biosafety level 4. The highest level of biosafety. This level is used for the diagnosis of exotic agents such as the Ebola virus that pose a high risk of life-threatening disease, which may be transmitted by the aerosol route and for which there is no vaccine or therapy.