Ang sikat ng araw ay maaaring makatulong mawala ang cor0navirus sa mga surfaces sa loob ng ilang minuto, ayon sa isang unpublished study na carried out ng US Department of Homeland Security Scientists, pero hindi pa na review ng independent experts.
Ang resulta ng kanilang pag-aaral ay nagsusuggest na ang radiation mula sa UV rays ay maka damage sa virus genetic materials at e hamper ang ability nitong mag replicate sa mga surfaces. Pero wala pang ebidensya na pwedeng [email protected] ng UV Rays ang virus sa katawan ng tao.
Ayon pa sa ulat ng Daily Mail:
The ‘evidence’ was unveiled at last night’s White House press briefing by DHS offical Bill Bryan, who has no scientific background – and triggered a bizarre outburst by Donald Trump.
On the back of the claims, Trump proposed two dangerous new treatments, which included injecting cleaning agents in the body and the use of ultraviolet lights.
Leading scientists today rubbished the use of UV rays as a therapeutic, and begged the public to not expose themselves to harmful radiation, proven to cause skin cancer. Makers of disinfectants rushed out emergency statements warning people not to consume them in any way.
One virologist said that sitting in the sun will not stop any pathogen replicating in an individual patient’s internal organs because it cannot penetrate the body.
Others told Mail Online it will not able to make its way ‘by some magic’ into the lungs to stop the infection in its tracks.
But they agreed that UV rays, which are used by hospitals in the US and UK for decontamination of areas, can kill viruses on surfaces – something which has long been well known.
The DHS ‘study’, first leaked last week, was carried out by the National Biodefense Analysis and Countermeasures Center. The laboratory in Frederick, Maryland, was set up following the 9/11 terrorist attacks to address biological threats.
‘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,’ Mr Bryan said. ‘We’ve seen a similar effect with both temperature and humidity as well.’
Bryan shared a slide summarizing major findings of the experiment that was carried out at the National Biodefense Analysis and Countermeasures Center in Maryland.
It showed that the virus’s half-life outside the body – the time taken for it to reduce to half its amount -was 18 hours when the temperature was 70-75F (21-24C).
That was based on a 20 per cent humidity on a non-porous surface, which includes things like door handles and stainless steel.
But the half-life dropped to six hours when humidity rose to 80 per cent – and to just two minutes when sunlight was added to the equation.
When the virus was aerosolized – suspended in the air – the half-life was one hour when the temperature was 70-75F with 20 per cent humidity.
In the presence of sunlight, this dropped to just one and a half minutes, according to the slides.
The paper itself was not immediately released for review, making it difficult for other experts to comment on how robust its methodology was.