Coronavirus: Sunlight is capable of inhibiting the spread of coronavirus instantly

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Coronavirus: Sunlight is capable of inhibiting the spread of coronavirus instantly

US Scientists claim

Friday, 24th April 2020

Senior US official declared that sunlight can destroy coronavirus according to new research, on Thursday. The study needs more evidence to announce it in the public.


Science and technology advisor of the Department of Homeland Security secretary, William Bryan reveals to the White House reporters that ultraviolet rays can impact pathogen, according to the government scientists. This brings hope that its spread may lessen in summer. It’s a known fact that UV light damages genetic material and replication ability.


He stated, “Our most striking observation to date is the powerful effect that solar light appears to have on killing the virus, both surfaces and in the air”. "We've seen a similar effect with both temperature and humidity as well, where increasing the temperature and humidity or both, is generally less favorable to the virus”.


But as of now it is difficult for the experts to comment on this study. What should be the wavelength and intensity and do they match the natural light condition during summer is the question.


Benjamin Neuman, chair of biological sciences, Texas A&M University-Texarkana told APF, “It would be good to know how the test was done, and how the results were measured”.


"It would be good to know how the test was done, and how the results were measured," Benjamin Neuman, chair of biological sciences at Texas A&M University-Texarkana, told AFP. He added, “Not that it would be done badly, just that there are several different ways to count viruses, depending on what aspect you are interested in studying”.


Brian shared the results of the experiment conducted at the National Biodefense Analysis and Countermeasures Center in Maryland. The finding was that, it requires 18 hours in 70-75 degree Farenheit and 20% humidity to attain half-life of the virus on a compound surface like door handles, steel etc.


When humidity was increased to 80% half-life dropped to 6 hours and to just two minutes when sunlight was added. Half-life was found to be 1 hour when temperature was 70-75 degrees and 20% humidity when the virus was aerosolized. When sunlight was added, this reduced to one and half minutes.


Bryan thus concluded that this “will create an environment (where) transmission can be decreased”.

However, this doesn’t mean that the pathogen will get eliminated totally. He stated, “It would be irresponsible for us to say that we feel that the summer is just going to totally kill the virus and then if it's a free-for-all and that people ignore those guides”.


Perhaps, that is the reason why Australia has less than 7,000 positive cases with 77 deaths.

Virus deteriorates quicker on hot surfaces as the fat layer that protects the virus dries out faster.

However, the number of cases might increase again in winter and fall even if it gets slower in summer.


Source: NDTV

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