BSL (Biological Safety Level)

Biological Safety Level (BSL) categorizes laboratory environments based on the risk of working with harmful microorganisms. There are four levels, ranging from BSL-1 (least risky, like basic teaching labs) to BSL-4 (most dangerous, handling highly lethal pathogens with maximum safety measures). Each level has specific containment procedures, equipment, and practices to protect personnel and prevent environmental release. The classification helps ensure appropriate safety standards are maintained for different types of biological agents, balancing scientific progress with health and safety considerations.