Ultraviolet light kills cold and flu viruses, and generates Vitamin D in the skin

Source
Sun or UVB augmented lighting	Vit D	Kill virus*
UVC air cleaner	- - - -	Kill virus*

UVC from the sun does not reach the surface of the earth
UVB from the sun, etc, kills viruses, but not as well as UVC
* Killing virus ==> reduce infecting self & others

• The effect of ultraviolet light upon absenteeism from upper respiratory infections in New Haven schools. 1951 PMID: 14847002
   Download the PDF from VitaminDWiki
• USE OF ULTRAVIOLET RADIATION IN REDUCTION OF RESPIRATORY CROSS INFECTIONS JAMA 1943 doi:10.1001/jama.1943.02840120010003
   Download the PDF from Sci-Hub via VitaminDWiki
• Using Ultraviolet Germicidal Lights for Air Cleaning
  "In a study within three office buildings, UVGI systems were turned on and off multiple times while not informing occupants. Work related self-reported acute health symptoms were assessed using questionnaires. There were statistically significant 20% to 40% decreases in symptoms during periods of UVGI system operation."
• UV-C reduces pediatric viral respiratory illness by 44% reporting on   2018 study
• UV LIGHT: A NEW TOOL FOR DISEASE PREVENTION Princeton Public Health Review of 3 studies - 2018
• The effect of ultraviolet-C technology on viral infection incidence in a pediatric long-term care facility| June 2018
   Download the PDF from VitaminDWiki
• Are Your Air Ducts a Cold and Flu Risk? How to Fight Back! Air duct cleaning, Ultraviolet air purifiers, HEPA air filters

Many UVC air purifiers for homes, hospitals, offices

• Germ Guardian $40 - Amazon

Natural UV from the sun also helps: more Vitamin D and kill viruses

• Exposure to solar ultraviolet radiation and respiratory tract symptoms in 1-year-old children - 2004 DOI: 10.1111/j.1600-0781.2004.00110.x
   Download the PDF from Sci-Hub via VitaminDWiki
  Children getting more UVB from the sun had fewer coughs, runny noses

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See also VitaminDWiki

• More UV and vitamin D, less infectious disease – Jan 2017
• UVB added in classroom reduced cavities, increased height, increased academics. etc
• Vitamin D from low cost UVB lamps
  Adding a few of these lamps to existing classroom or office lighting might do the job for < $500.
• All items in category UV and vitamin D 381 items
• Top UK soccer coach installed vitamin D booths in his club – Dec 2012
• UV lamps were used in WWII bunkers
• Overview Influenza and vitamin D
• How you can greatly cut your chance of getting the flu (vitamin D just twice a month)

Items in both categories Virus and UV are listed here:

All of the studies in Breathing and Virus are listed here: