Hepa Filter as part of their filteration Systems. Hepa Filter are criticle in the Prevention of the spread of airborne bacterial and viral Organisms and therefore, Infection. Typically, Medical-use HEpa Filtration System also incorporate high-enrgy ultra Voilet light unit to kill off the live bacteria and viruses trapped by the filter media. Some of the best-rated HEPA units have an efficiency rating of 99.995% down to 0.3 micron. which assures a very high level of protection against airborne Disease transmission.