I'm sure I addressed this subject back in Feb/Mar 2020... but perhaps not here... or since ?
Quick search popped up with this, from that same period... in a recent retread posting... which at least mentions the humidity issue...
Ozone: The weapon to curb COVID-19
I'm a fan of Ozone... built my own ozone generator early last year, copying one i'd made some years back...
After making it, have mostly used it under the bathroom sink where some ancient leak had left some rather undry drywall that was generating a musty smell... which it isn't anymore... As mine is an intense and unfiltered UV source... can't look at it or it will burn your eyes... The UV light sterilizes surfaces very rapidly... The ozone is made by the intense UV source ionizing the air. Seems that will a persistent use over some time... the ozone penetrated the dry drywall well enough to bleach it inside... but that with fairly high concentrations in the small closed cabinet below the sink... When I could first detect it in the house i'd turn it off without opening the cabinet... and it never got to be enough that it tickled my tonsils...
Ozone has a very recognizable odor... Once you've smelled it you will know it... It's similar to the "fresh" aspect of a chlorine bleach smell in the air... as the bleach also ionizes things. And, lightning storms make lots of ozone... you smell it strongly after a nearby strike... I smell it often in the mountains... the rolling of the air up the slopes has an significant electrical ionizing component... St. Elmo's Fire often comes with that same smell...
Had an old diesel truck I used to drive over the mountains... and every time I got about a 1000 feet up in elevation I'd start to smell ozone... I'd have to quickly veer over to the edge of the freeway, because within less than a minute the truck would stall out... and then it wouldn't start again for about 10 minutes... and then... like it never happened. But, did it every time ? Still don't understand that... Was it the truck making the ozone... or just not liking it ?
But, a little bit of ozone is good... and more than a little bit of ozone can easily inflame your lungs to the point of discomfort and give you a dry hacking cough all by itself... which with Covid clearly isn't what you're going for...
The virus is really just a very small particle of dust...
So, when you see a thunderstorm clear the air of a dust cloud it had just kicked up before it began to rain, thrash and crash about ? How does it do that ? Probably worth studying... Pretty sure filtration guys didn't just miss it somehow ?
But, dust bits that absorb humidity or become absorbed by tiny droplets... become bigger and heavier... which seems good... if they fall out faster and don't get inhaled first ?
And, then... back to the games in statistics... where reductions at each stage and opportunity have cumulative impacts...
Ozone generators are ion sources... but not the only ones... You can buy some pretty decent ion generators that work great to clear the air... some even alternate pulses with positive and negative to try to catch particles and reel them back in... But, use one very long without that positive attraction pulse... and your walls get dirty, fast... as the ions attach to tiny bits in the air... and then electrostatic forces draw the smoke, dust, smells... whatever... and they stick to the walls as a black goo... A pain to clean if the walls have rough surfaces... but, you'd be breathing that goo otherwise... ?
Lots that SHOULD be done routinely in upgrading public facilities to minimize risks...
The only places I know that are at all serious about it... are large animal Vet hospitals...
If they get critters coming in with anthrax, or with some wasting disease... people will be at risk of getting sick pretty fast... so they've got UV lights at the entrances to kill whatever comes in that's small enough that UV will kill it... And, why don't they have those kinds of things at hospitals... on cruise ships, etc ?
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