Study shows proof that a safer UV light effectively kills virus causing Covid-19

A side effect people should be aware of is that living in a sterile environment can harm your children's immune systems, if you have children.

No great mystery.

How could we have evolved from single celled organisms?

https://www.nature.com/articles/s41591-020-0820-9 https://www.sciencealert.com/here-s-what-scientists-think-of...

So that's the background on how the UV light acts and disrupts a cells ability to survive. Now, about your question on how could a virus evolve if UV light kills it. Easy... the virus doesn't spend a ton of time outside of your body. Most transmission is person-to-person, there isn't a ton of person-to-surface-to-person spread therefore it's not like the virus is sitting on a handrail in the sun for days. Also, as I mentioned above, some mutations don't result in any change. There is a lot of redundancy in the DNA code (see DNA codon table 1). Not every combination produces a unique aminoacid.

1 - https://en.wikipedia.org/wiki/DNA_codon_table

My microbiology background is a bit dated, so my facts might be a bit off here and there.

There is virtually no way for scientists to look at DNA and say "oh yeah this was manmade" (or not manmade). Possibly if there is some really obvious splicing marker used or something.

the entire sequence can be put into a computer and custom generated.

I don't think the sensitivity is specific to COVID-19. I believe it extends to all coronaviruses, if not all flu viruses.

They developed in places that are not water and moved to other places through water by occupying small spots of non-water while in transit.

Same with the virus. It developed in places that UV doesn't reach, like insides of larger living things, and travel to other habitable places by exposing themselves to UV only very briefly while being somewhat shielded by water in breathed out droplets.

Most viruses dont contain the mechanisms to resist damaging solar radiation

It can create Ozone, which kills bacteria and damages respiratory tracks. It can be a bug or a feature in the right hands.

Hard UV also leaves a nasty sunburn.

In Russia it's used for domesric disinfection for a long time - you turn on a big lanp and leave the room for a few hours.

Pretty sure they work fine. But they take a lot longer than wiping with soap and hot water or disinfectant. For dishwashers it's going to be difficult to make sure you expose every surface of every utensil, compared to filling the machine with hot air and steam. You'd need a much more space-hungry design than standard models.

Proper UV sterilization takes time (minutes, hours). I'd worry that many people will just wave a light and think "its clean". It doesn't work that way.

But yes, this is how UV light is sometimes actually used. Shining on an empty table in a lab, for one hour. Even then, you don't take it as a 100% guarantee that there are no viruses left.

Second, UV light hurts humans, too. Ignore the safety and remain in the room when the UV light is turned on, you get cancer. In the lab, people are careful. In an average household, it would be a question of time before someone gets exposed to the UV light.

If you are careful, you can use the UV light on your room, or kitchen, and it is "better than nothing". (Not sure if you even need to cover your windows, because I think glass already reduces the UV part of light, plus the intensity is reduced by square of distance so you probably wouldn't hurt random people on the street.) But it takes a lot of time, and it only reduces the number of viruses by some fraction.

Considering that COVID-19 is usually spread by air, not by touching surfaces, opening your windows probably achieves much more than using the UV light in your room or kitchen. For some other viruses, the numbers could be different.

Also, the dishwasher already kills a lot of viruses by using higher temperature than when you wash dishes by hand.

Just like for kids living in a clean environment (no dogs, dirt, etc.) are more prone to illnesses.

Natural immunity lasts for four months, like common cold. "Vaccine" doesn't make sense.

It would be masks, if only people would wear them when they need to. It's also a social & compliance problem.

But it might be helpful to know that the power/strength of light diminishes according to the inverse-square law. That is, if one doubles the distance, there is quarter the amount of light falling on a given area (vis: it is quarter of the strength), and, vice versa, if one halves the distance, the amount of light increases four-fold.

Due to this rate of fall-off, it means that it is much more effective if the light source is closer.

222nm is blocked by the (upper, I believe) atmosphere.

>An in vitro experiment by HU researchers showed that 99.7% of the SARS-CoV-2 viral culture was killed after a 30-second exposure to 222 nm UVC irradiation at 0.1 mW/cm2.

"Suppose that we hit the body with a tremendous, whether it's ultraviolet or just very powerful light," Trump said at the White House coronavirus press briefing, adding: "Supposing you brought the light inside the body, which you can do either through the skin or in some other way."

It was absolutely not considered a scientific impossibility that UV light would have an affect on the virus outside the body.

We know that he won’t stop being who he is though, so we are being extorted by the situation to change.

People never contested that UV light could kill the virus (there were many experiments running at the time, and I think some conclusions too).

The Trump suggestion is stupid simply because UV light isn't selective, and whatever it did to the virus inside your body, it would do exactly the same to your body too. Just like his suggestion of injecting bleach - it would almost certainly kill the infection, just as soon as it would kill you.

Citation required. UV light as a disinfectant is fairly well known.

It's not because he suggested UV light that people went ballistic. It's because he suggested shining it inside people's bodies. In that same press conference he also suggested using bleach inside the body.

What the original post mentions is directly hitting the virus. If we hit the body with enough UV light to destroy the virus inside us we would destroy the body too.