By Published On: March 30, 2022

The COVID-19 pandemic has stimulated a plethora of environmental solutions—some new, some old, some with a sound scientific rationale and independent evidence of efficacy and safety, others without a solid rationale or independent evidence. Despite their differences, promotions for these various environmental solutions almost always claim 99.9% or greater reduction in pathogens. Some basic principles may help in separating interventions likely to be effective from those less likely to be protective. I will emphasize 2 critical considerations not always evident in the current recommendations or reviews.

To be effective, the rate of air disinfection (pathogen removal) must be sufficient to exceed the rate of pathogen generation. For highly infectious viral pathogens like measles and the Omicron variant of COVID-19, the pathogen generation rate may exceed the capacity of entire categories of interventions, like mechanical ventilation or room air cleaners.2
The most effective air disinfection is likely to be in the room where transmission is occurring—not in the building ventilation system.

The article covers the following four main areas:
1.Assessing Building Ventilation
2.Is Ventilation Always Enough?
3.The Cost of Adding Equivalent Air Changes
4.How Well Does GUV Work?

Conclusions

In summary, I have emphasized that effective air disinfection for highly infectious pathogens like the Omicron variant of COVID-19 needs to be high—more than the 6 to 12 ACH recommended by CDC, and in the room where transmission is occurring as opposed to in the ventilation system. Although room air cleaners can be effective in relatively small rooms, in large-volume spaces it is difficult to achieve high rates of effective EqACH due to noise, drafts, short-circuiting of air, and the flow-limits of the machines themselves. The most effective and cost-effective approach to large volume rooms to achieve the high rates of EqACH needed for the Omicron strain is GUV upper room and, increasingly, 222 nm far UV.10 The role of chemical air disinfection, bipolar ionization, and H2O2 generators is less clear pending additional research, especially in application-like settings.

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Currently, the most effective and safest way to fight against COVID-19 is far uvc 222nm technology. This is a UV-based disinfection method which is based on biophysical principles and a key advantage of the UV-based approach is that UV light is likely to be effective against all airborne microorganisms, in marked contrast to vaccination methods.

For example, while the inactivation efficiency of UV light will almost certainly vary as different strains of influenza virus emerge, they are unlikely to be significant. Similarly, as multidrug-resistant variants of bacteria emerge, their UV inactivation capacity is unlikely to vary greatly.

Care222 is a new disinfecting light source that, even though not harmful to the skin or eyes of humans or animals, deactivates bacteria and viruses in the same manner as conventional ultraviolet sanitizers.

Since far-UV light can pass through and therefore inactivate bacteria and viruses which are usually micrometres or smaller, whereas far-UV light cannot even penetrate the outer layer of dead cells of human skin or the outer tear layer of the eye surface due to its strong absorption in biological materials.

Care222 uses an excimer lamp (a mercury-free UV excimer light source produced by Ushio especially for outputting monochromatic ultraviolet with a primary wavelength of 222 nm) in combination with a special optical bandpass filter (200 to 230 nm) which passes only ultraviolet wavelengths that have no harmful effect on people.

Ushio holds exclusive rights to utilization of the key technology, which was patented by Columbia University (New York, NY) in 2012.

Only 222 nm, which is filtered by a special optical bandpass filter for the rest of the harmful wavelengths, is safe for humans.

The use of Care222 in public places is a safe and effective way to limit the spread and transmission of air-mediated microbial diseases, such as schools, hospitals, stadiums, sports grounds and offices, and this approach may help to limit seasonal infections, the spread of tuberculosis and major epidemics. It’s inevitable far uvc will become part of the new World people are more aware and want to be protected from viruses.

Click here to know more about Ushio’s Care222 technology: www.care222.com

My Lumens Artemis Far UVC Disinfection Devices equipped with Care222 module(filtered far uvc 222nm technology) developed by Ushio, Japan.

1. Customized Solutions—Develop products flexibly according to the different needs of market

2.Ceiling installation, Good match to the environment(no destroy to the impression).

3.Easy to install, and save cost.

4.Use MCPET developed by Furukawa—Indirect lighting Keeps eyes from fatigue, protecting eyes.

Continuously disinfecting in occupied space but not harmful to skin and eyes of people, which could be used in dental offices, medical rooms, high-end offices, elevators, hospitals, class rooms, etc.

Care for you, Safe for you, and Protect you!

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