TOPLINE:

Germicidal ultraviolet (GUV) light appliances in long-term care facilities for older adults did not significantly reduce acute respiratory infection rates within study cycles but did show a significant reduction in weekly infections rate over time.

METHODOLOGY:

Researchers conducted a multicenter, randomized trial to assess whether GUV appliances could reduce the incidence of airborne acute respiratory infections in four long-term care facilities for older adults in Australia.

The facilities were divided into eight zones, representing 211,952 bed-days. The zones were assigned to active GUV or inactive (control) conditions for 6 weeks, followed by a 2-week washout, a crossover, and another 2-week washout, spanning a total of 110 weeks.

The primary outcome measure was the incid

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