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The experiment that proved airborne disease transmission

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31–40 of 126 posts

Re: The experiment that proved airborne disease transmission

#31

UV-C lights that irradiate an air duct is literally the most surprising (and in retrospect obvious) thing I learnt today. Is this something a household HVAC could be upgraded to. Do HNers in areas that have air con think it's a "yeah people will want that" idea?

It isn't very practical, as long as you don't worry about getting the virus from the outside in, which would be an unusual thing to worry about for home owners.

Just vent it out in the open air and not on people.

Re: The experiment that proved airborne disease transmission

#32
Ok, dumb idea time: suppose that everyone in an office sits on a chair that raises their body to X volts. At the same time a collector mesh is provided at each desk, at -X volts, but shielded so that you can't touch it and shock yourself.

What X is large enough to ensure that all the virus particles you cough out end up at the collector? Is it possible to do this without electrocuting everyone?

Re: The experiment that proved airborne disease transmission

#33

UV-C lights that irradiate an air duct is literally the most surprising (and in retrospect obvious) thing I learnt today. Is this something a household HVAC could be upgraded to. Do HNers in areas that have air con think it's a "yeah people will want that" idea?

Any HVAC company can install this for you right now, or you can buy a kit and do it yourself. A UV light bulb to install in your central air system is an off the shelf product. "Whole house UV air purifier" as a search term will pull these up.

Re: The experiment that proved airborne disease transmission

#34

UV-C lights that irradiate an air duct is literally the most surprising (and in retrospect obvious) thing I learnt today. Is this something a household HVAC could be upgraded to. Do HNers in areas that have air con think it's a "yeah people will want that" idea?

It's important to remember that your immune system is improved by coming in contact with common viruses. This is even more important for kids.

There's evidence that people that have been exposed to previous, weaker, coronaviruses are more likely to have mild responses to Covid-19, for example.

https://science.sciencemag.org/content/370/6512/89

Re: The experiment that proved airborne disease transmission

#35
post #18

> ultraviolet-C disinfection technology for air purification systems that were installed in health care facilities, factories, and NASA space capsules. Today, this technology is being used in Shanghai, Moscow, and New York City to protect subway and bus passengers against SARS-CoV-2, and China is also using the technology to disinfect hospitals Russian FSB has just arrested (on secret state security charges) on his s…

Any kind of air cleaning is relevant, and in demand, in China.

Unfortunately, air purifiers have embraced the situation by demanding luxury pricing.

Re: The experiment that proved airborne disease transmission

#36
post #21

Earlier quoted context omitted.

Since eradicating the virus has become impossible, most national governments are currently pursuing a herd immunity strategy by default. They're just doing it at slightly different rates. In the USA the current daily rate of confirmed new cases is about 43000, not 55000. However there are a large number of "dark matter" cases not counted in official statistics. About 40% of infections are asymptomatic, and many more…

What countries are actually following a strategy to reach herd immunity by having "enough" people fall ill and hopefully recover (having "recovered" does not preclude persisting damages btw!)? Most countries are rather waiting for a vaccine to become available and try to minimize the number of sick and dead in the meantime without interfering with economy too much. (54.4k was number of newly confirmed cases on friday…

A vaccine is unlikely to wipe out the virus for good. They just aren't that effective. We can't wipe out other coronaviruses or the common cold by vaccination even if we wanted to.

It will continue to circulate in the population, just in a less explosive manner. This also means it is possible we will never reach herd immunity in some absolute sense much like we haven't for other coronaviruses.

Re: The experiment that proved airborne disease transmission

#37
post #8

It seems the reasoning by officials is, "Yes, it's airborne, but there's not enough N95 masks for everyone so we don't want to cause panic or an N95 mask shortage for doctors and nurses by admitting it's airborne."

Also supposedly if a disease is declared airborne then hospitals have to adopt various isolation measures beyond just N95 that are very costly. This may be the reason the powers that be won't announce airborne transmission until after the pandemic is over.

It's useless to say this without evidence.

Re: The experiment that proved airborne disease transmission

#38
post #27

Earlier quoted context omitted.

We make fun of medieval medicine but look at this shit! We're pretending that saying some magic words has an effect on a physical reality of disease spread! Who says that saying its airborne "has" to mean that certain procedures have to be adopted? That's not a rule of the universe, it's a rule that humans came up with and agreed upon and humans have the power to fix. We distilled down a set of physical principles in…

While I understand the frustration, the reality is we shouldn’t be making fun of either. Just because the end result of something is inarguably “stupid” does not mean that any of the things that went into it are “stupid.” To do the Hacker News thing and make a bad analogy to computer science topics in a totally irrelevant thread, this is how I view a lot of stuff people complain about these days (think JavaScript, or…

The people who will die because we haven't told them how to protect themselves don't care.

Re: The experiment that proved airborne disease transmission

#39
post #21
post #5

Earlier quoted context omitted.

Why bother to disinfect when you can ventilate? Air with pathogens out, fresh air without pathogens in. (Regarding herd immunity: you're aware that at the current rate of 55000 people per day, it would take 10 years to infect 60% of 320 million people? Nothing to say of the countless casualties that you would get in the process.)

Since eradicating the virus has become impossible, most national governments are currently pursuing a herd immunity strategy by default. They're just doing it at slightly different rates. In the USA the current daily rate of confirmed new cases is about 43000, not 55000. However there are a large number of "dark matter" cases not counted in official statistics. About 40% of infections are asymptomatic, and many more…

Agree with "herd immunity strategy by default". Absent a vaccine, about the same percentage of people will become sick, while a larger percentage is exposed but does not become sick. At some point, again minus a vaccine, few enough people will be left as potential replicating hosts, that the virus will not be replicating fast enough to maintain the country's epidemic. Countries will differ by the breadth of the curve, but not the area under it (adjusted per-capita of course). On the other hand, if you are one of the countries with a long curve, and an effective vaccine arrives before the end of it, you benefit.

Re: The experiment that proved airborne disease transmission

#40
post #8

It seems the reasoning by officials is, "Yes, it's airborne, but there's not enough N95 masks for everyone so we don't want to cause panic or an N95 mask shortage for doctors and nurses by admitting it's airborne."

Not the first time we were lied to as part of this disaster:

https://www.nytimes.com/2020/09/30/world/europe/ski-party-pa...

Turns out the "don't close borders" advice was a cached thought related to a plague outbreak in India over 25 years ago, and welded in place by politics.

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