Researchers at the University of California, Santa Barbara, Oregon State University, the University of Manchester, and ETH Zurich called for careful study of the ability of sunlight to neutralize SARS-CoV-2 after discovering that the latest research on this issue did not meet the standard.
The research team compared the data from a July 2020 study with the theory of inactivating coronavirus by solar radiation published a month ago. The study reported the rapid rate of SARS-CoV-2 in a laboratory environment. Sunshine is inactivated.
They noticed that the virus inactivation rate in the experiment was eight times faster than predicted by the latest theoretical model. Paolo Luzzatto-Fegiz, professor of mechanical engineering at the University of California, Santa Barbara and lead author, said in a statement: “The theory is that inactivation is performed by causing UV-B to hit the virus’s RNA and cause damage to it. of.”
However, the research team believes that UV-B inactivated RNA “may not be all.” Scientists speculate there This may be another mechanism besides UV-B (e.g., components with lower solar energy) that inactivate RNA.
Luzzatto-Fezig explained: “People think that UV-A has little effect, but it may interact with some molecules in the medium.” These molecules may interact with the virus to speed up the inactivation.
Luzzatto-Fegiz said: “As a result, scientists do not yet know what happened.” “Our analysis pointed out that additional experiments are needed to test the effects of specific light wavelengths and medium components.”
If it turns out that UV-A can inactivate the coronavirus, it will prove to be fruitful, because there are many types of cheap LED bulbs that are stronger than natural sunlight. UV-A can also potentially be used to enhance the effectiveness of air filtration systems with relatively low human health risks.