It seems that before antibodies were introduced to kill major viral infections, ultraviolet irradiation( sometimes called infrared light, where an object is exposed to radiation) of the blood was a common occurrence, according to many. Here Dr. Joseph Mercola, Mercola.com, reflects on whether UV light can be used to kill the COVID-19 virus:

“Is it possible that ultraviolet light (UV) might be an internal treatment for SARS-CoV-2? We know that it kills pathogens, especially on surfaces. And, it's already used in food processing,¹ wastewater treatment facilities² and medical settings to kill germs³ — in fact, according to DukeHealth, it can cut the transmissibility of four major superbugs.⁴

William Bryan, acting head of the Science and Technology Directorate at the Department of Homeland Security, even hinted that UV light might kill the coronavirus.⁵ But there is also evidence that UV light and a related therapy, ozone, can be used internally to treat viral infections, including COVID-19 infections.

Ultraviolet Irradiation of Blood: A Cure That Time Forgot

Ultraviolet irradiation of blood (UBI), also called photoluminescence therapy (PT), was an accepted treatment for infections until the 1940s and 1950s,⁶ used for septicemia, pneumonia, tuberculosis, polio and more. The popularity of UBI was eclipsed by the debut of penicillin antibiotics and the Salk polio vaccine, medical developments that were considered miracles.

There are two remarkable features to UBI, which has been called in the medical literature “The Cure That Time Forgot.” First, there were no reports of the treated microbes developing resistance, a phenomenon so common with antibiotics it has limited their usefulness and created dangerous “superbugs.”⁷

Secondly, the deactivation of pathogens that occurs with UBI may not stem from the virus-killing properties from UV light that are seen on surfaces, but other mechanisms. According to Advances in Experimental Medicine and Biology:⁸

“UBI may enhance the phagocytic capacity of various phagocytic cells (neutrophils and dendritic cells), inhibit lymphocytes, and oxidize blood lipids. The oxidative nature of UBI may have mechanisms in common with ozone therapy and other oxygen therapies …

UBI affects various functions of red blood cells and various different leukocytes as has been proven in various in vitro studies. A common model is stimulator cells in mixed leukocyte cultures; another is helper cells in mitogen- stimulated cultures. UV also reversed cytokine production and blocked cytokine release. UV can also disturb cell membrane mobilization.”

While the researchers do not question the effectiveness of UBI in treating infections, they address how the exact mechanism has not been fully pinned down:

“However it is not impossible, that the killing of circulating lymphocytes could reduce systemic inflammation, which would again be beneficial in cases of sepsis. It is also clear that UBI can oxidize blood lipids and lipoproteins, and therefore increase oxidative stress.

However it is also possible that a brief burst of oxidative stress, may be beneficial, whereas continued chronic levels of oxidative stress have been generally considered as detrimental. Many antioxidant defenses are up-regulated by brief exposure to oxidative stress … The oxidative nature of UBI has encouraged us to draw parallels with ozone therapy.”⁹

Early UBI Investigations

The suspicion that UV could kill pathogens came from a simple discovery in 1877. Scientists noted that sugar water stayed clear when it was in the sun but turned cloudy when it was in the shade. When examined under a microscope, the “cloudiness” was found to be bacterial growth, which the UV light had successfully retarded.”

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