Containment Level 4 (CL4) is the highest safety level used in laboratories that handle dangerous pathogens. These facilities are designed to contain highly infectious agents that pose a significant risk to public health, such as the Ebola virus or Marburg virus. CL4 labs have strict protocols and advanced engineering controls to prevent any accidental release of these pathogens into the environment. In a CL4 facility, personnel must wear specialized protective gear, including full-body suits with independent air supply. The labs are equipped with multiple barriers, such as airlocks and high-efficiency particulate air (HEPA) filters, to ensure that no contaminants escape. These stringent measures help protect both the workers and the surrounding community from potential outbreaks.