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After a patient is discharged, some hospitals use UV-C disinfection systems as a final step before the room is used again. The blue or violet-looking light is produced by equipment designed to expose surfaces and air to ultraviolet radiation, helping reduce remaining microorganisms and the risk of infection. During the disinfection cycle, people must stay out of the room because UV-C radiation can damage the eyes and skin with sufficient exposure. That's why doctors, nurses, and other staff leave before the system is activated. What looks like an ordinary blue light is actually a powerful, safety-controlled disinfection process. Do you like this content? Follow us @gzreel #watchintohistory #History #medicalhistory #Science #fascinatingfacts