5 ms·

Never mind the fact that they are not rated to filter viruses.

elsonrodriguez 5y ago
Many of the test aerosols they use to test N95s and similar are smaller than the coronavirus. Also they have done virus measurements from sick people through masks that prove there is filtration happening.
- champagnois 5y ago
  N95s work via an electric polarity of the filter. This charge is what captures the viruses. Filtration fades when the charge is lost. I don't need to see your studies because I have helped build and certify N95 factories and know a lot about it. The masks arent usable for long and arent reusable, either. Cloth masks do nothing and are not a consideration to any serious adult.
  - 323 5y ago
    > The masks arent usable for long and arent reusable Only because lawyers got involved and are trying to minimize liability (ie: you used it wrongly, not our problem anymore). Or are you telling me that if I put an N95, and remove it after 5 min, I can't reuse it 1 hour later, but it's fine if I wear it 8 hours straight. Yes, yes, it could get contaminated on the inside surface in between, I know. But will it stop filtering viruses just because I took it off?
    - AnthonBerg 5y ago
      Masks are eminently reusable. From a Twitter thread by Dr. Claire J. Horwell, Director of International Volcanic Health Hazard Network (IVHHN), Professor at Duram Volcanology – “here's a short thread to answer the question: can you wear a disposable #facemask more than once? The answer is YES. Many manufacturers state that masks should be disposed of after 8 hours but this is not true. […] Unless a mask has become clogged full of particles in a very high exposure scenario (e.g. mining, construction) or the worker is in a contaminated front-line healthcare setting, it is still perfectly useable after 8 hours, unless it is broken.” https://twitter.com/claire_horwell/status/1466400270137630727 https://twitter.com/claire_horwell/status/146640027013763072...
  - elsonrodriguez 5y ago
    Why make the claim that n95s don't filter viruses and then say that they do indeed capture viruses? Also yes the filtration fades but there's data out there showing 40 hours of use on KF94s still showing filtration percentages in the low 90s.
    - champagnois 5y ago
      You misunderstood or I was not clear. N95s do filter viruses when used properly and still within their rated window of use.
  - AlexandrB 5y ago
    > N95s work via an electric polarity of the filter ...as well as mechanical filtration[1]. > To minimize the effect of electrostatic attraction, we used isopropanol (IPA) to remove nearly all dipole charges in the filter layer (Figure Figure77C) and measured the filtration efficiency. The filtration efficiencies of N95 respirators after IPA treatment decreased about 7–15% after removing all dipole charges. Such decreases in filtration efficiencies indicated that electrostatic charges contributed to the filtration performance. Others here have pointed to studies RE the efficacy of cloth masks. Which, while not great, is not 0 either. I'm willing to be wrong, but do you have any research showing that "Cloth masks do nothing"? [1] https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC7724761/ https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC7724761/
phailhaus 5y ago
Surgical masks reduce COVID-19 spread, large-scale study shows https://med.stanford.edu/news/all-news/2021/09/surgical-masks-covid-19.html https://med.stanford.edu/news/all-news/2021/09/surgical-mask... Even cloth masks reduced transmission, and "reduce the overall likelihood of experiencing symptoms of respiratory illness during the study period."
autoexec 5y ago
It doesn't matter. Putting literally anything in front of your virus spewing face hole is going to help to some degree. It's not as if the crook of our arms are rated to filter viruses, but that hasn't stopped health organizations all over the world from recommending the vampire cough for years. It's true that a mask alone isn't enough to guarantee anyone's safety and while community spread is high sending kids into schools is pretty much asking for them to get infected, but wearing masks is still far better than doing nothing, it's just that sadly "nothing" is all some people are willing to do to prevent the spread of the virus.
- vikingerik 5y ago
  Your face hole is not virus spewing if you aren't sick.
  - autoexec 5y ago
    Too bad you can't know if you're sick or not until it's too late. It's one of the reasons this virus spreads so quickly. Even if you're not sick wearing masks also helps to protect you from getting sick. It's win/win for extremely minimal effort/inconvenience.
    - deleted 5y ago
      [deleted]
    - vikingerik 5y ago
      Too bad that condemning everyone as sick with zero evidence isn't how a free society works. Let's imprison everyone who "might" commit a crime. Masks have gigantic effort/inconvenience and mental health costs. I can't think of anything but counting down the seconds until ripping that f*cking thing off my face while being strangled by that shit. Yet nobody cares about anyone else's mental health over their own perceived safety.
      - rmah 5y ago
        Lol, if you think "Masks have gigantic effort/inconvenience and mental health costs", your life must be a continuous living hellscape.

Many of the test aerosols they use to test N95s and similar are smaller than the coronavirus. Also they have done virus measurements from sick people through masks that prove there is filtration happening.

champagnois 5y ago
N95s work via an electric polarity of the filter. This charge is what captures the viruses. Filtration fades when the charge is lost. I don't need to see your studies because I have helped build and certify N95 factories and know a lot about it. The masks arent usable for long and arent reusable, either. Cloth masks do nothing and are not a consideration to any serious adult.
- 323 5y ago
  > The masks arent usable for long and arent reusable Only because lawyers got involved and are trying to minimize liability (ie: you used it wrongly, not our problem anymore). Or are you telling me that if I put an N95, and remove it after 5 min, I can't reuse it 1 hour later, but it's fine if I wear it 8 hours straight. Yes, yes, it could get contaminated on the inside surface in between, I know. But will it stop filtering viruses just because I took it off?
  - AnthonBerg 5y ago
    Masks are eminently reusable. From a Twitter thread by Dr. Claire J. Horwell, Director of International Volcanic Health Hazard Network (IVHHN), Professor at Duram Volcanology – “here's a short thread to answer the question: can you wear a disposable #facemask more than once? The answer is YES. Many manufacturers state that masks should be disposed of after 8 hours but this is not true. […] Unless a mask has become clogged full of particles in a very high exposure scenario (e.g. mining, construction) or the worker is in a contaminated front-line healthcare setting, it is still perfectly useable after 8 hours, unless it is broken.” https://twitter.com/claire_horwell/status/1466400270137630727 https://twitter.com/claire_horwell/status/146640027013763072...
- elsonrodriguez 5y ago
  Why make the claim that n95s don't filter viruses and then say that they do indeed capture viruses? Also yes the filtration fades but there's data out there showing 40 hours of use on KF94s still showing filtration percentages in the low 90s.
  - champagnois 5y ago
    You misunderstood or I was not clear. N95s do filter viruses when used properly and still within their rated window of use.
- AlexandrB 5y ago
  > N95s work via an electric polarity of the filter ...as well as mechanical filtration[1]. > To minimize the effect of electrostatic attraction, we used isopropanol (IPA) to remove nearly all dipole charges in the filter layer (Figure Figure77C) and measured the filtration efficiency. The filtration efficiencies of N95 respirators after IPA treatment decreased about 7–15% after removing all dipole charges. Such decreases in filtration efficiencies indicated that electrostatic charges contributed to the filtration performance. Others here have pointed to studies RE the efficacy of cloth masks. Which, while not great, is not 0 either. I'm willing to be wrong, but do you have any research showing that "Cloth masks do nothing"? [1] https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC7724761/ https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC7724761/

phailhaus 5y ago

Surgical masks reduce COVID-19 spread, large-scale study shows https://med.stanford.edu/news/all-news/2021/09/surgical-masks-covid-19.html https://med.stanford.edu/news/all-news/2021/09/surgical-mask... Even cloth masks reduced transmission, and "reduce the overall likelihood of experiencing symptoms of respiratory illness during the study period."

autoexec 5y ago

It doesn't matter. Putting literally anything in front of your virus spewing face hole is going to help to some degree. It's not as if the crook of our arms are rated to filter viruses, but that hasn't stopped health organizations all over the world from recommending the vampire cough for years. It's true that a mask alone isn't enough to guarantee anyone's safety and while community spread is high sending kids into schools is pretty much asking for them to get infected, but wearing masks is still far better than doing nothing, it's just that sadly "nothing" is all some people are willing to do to prevent the spread of the virus.

vikingerik 5y ago
Your face hole is not virus spewing if you aren't sick.
- autoexec 5y ago
  Too bad you can't know if you're sick or not until it's too late. It's one of the reasons this virus spreads so quickly. Even if you're not sick wearing masks also helps to protect you from getting sick. It's win/win for extremely minimal effort/inconvenience.
  - deleted 5y ago
    [deleted]
  - vikingerik 5y ago
    Too bad that condemning everyone as sick with zero evidence isn't how a free society works. Let's imprison everyone who "might" commit a crime. Masks have gigantic effort/inconvenience and mental health costs. I can't think of anything but counting down the seconds until ripping that f*cking thing off my face while being strangled by that shit. Yet nobody cares about anyone else's mental health over their own perceived safety.
    - rmah 5y ago
      Lol, if you think "Masks have gigantic effort/inconvenience and mental health costs", your life must be a continuous living hellscape.