Air Filtration and UV Disinfection Greatly Reduce Viruses in Hospital Wards

As I wrote earlier, it’s puzzling that there isn’t more attention given to air filtration and UV light disinfection in hospitals, since these techniques have been shown to kill superbugs.

A recent paper also shows that air filtration and UV disinfection can greatly reduces SARS-COV-II in hospital wards. The authors installed portable air filters with UV disinfection on two COVID hospital wards in the UK. The air was tested for viruses, bacteria and fungi before the filters were turned on, during the time the filters were on and then again after the filters were turned off.

The results:

Airborne SARS-CoV-2 was detected in the ward on all five days before activation of air/UV filtration, but on none of the five days when the air/UV filter was operational; SARS-CoV-2 was again detected on four out of five days when the filter was off.

Importantly, in addition to greatly reducing SARS-CoV-2 the portable filters and UV light also greatly reduced multiple viral, bacterial, and fungal pathogens. In the figure at right Air Filter Off is on the left and Air Filter On is on the right.


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