Viruses are the most difficult pathogens to test, as they require a living host to incubate and are also very expensive to test. As a result, viruses are the least studied pathogen regarding the effects of photocatalytic oxidation (PCO). The method of testing viruses is normally to use a surrogate, since the actual virus is seldom available. To prove PCO kills a high percentage of Coronavirus (COVID-19, an enveloped virus), a surrogate or close relative of this strain was used for test purposes. Previous testing on H5N8, an enveloped virus used as a surrogate for H1N1 (Swine Flu) and H5N1 (Avian Flu) viruses, has been conducted by Fushou University in China in 2006 and, it was found there was a complete reduction in virus viability (100% in 24 hours). Testing has also been done at Teiko University by Ryuichi Nakano et al and published by Photochemical & Photobiological Sciences in 2012, on the Influenza A virus, which H1N1 and H5N1 are a subgroup of. The results showed 100% kill in 10 hours.
Testing by JungEun Lee et al and published by Applied Environmental Microbiology in 2008 showed a 99.6% reduction in Norovirus (a non-enveloped virus) over a 24 hour period using MNV-4 (Murine Norovirus). Therefore, previous testing does show extremely positive results on very similar enveloped viruses as well as non-enveloped, positive and negative sense viruses (see the table page).
Since COVID-19, positive sense and enveloped, is very similar to H1N1 and H5N1 (both being negative sense and enveloped viruses and being a subgroup of Influenza A virus, negative sense and enveloped). Testing has proven the UVAIRx reactor is also very effective against Norovirus, a non-enveloped positive sense stranded virus. Therefore, it is clear evidence that UVAIRx would have a significant impact on the current strain of Coronavirus.
The illustration included describes the difference between enveloped and non-enveloped viruses. The table page shows some of the testing that has been done on PCO using the UVAIRx reactor and the results. All papers are available in published form over the Internet or directly from UVAIRx.
Dr. Gregg Dickerson, MD
Dr. Claude Selitrennikoff,
PhD University of Colorado School of Medicine
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