4 ms·

Can anyone put numbers on the graphics? That is, assume the two people in the graphic are sitting across a dining table (1m apart) and conversing in a normal t

by nkurz 6y ago

Can anyone put numbers on the graphics? That is, assume the two people in the graphic are sitting across a dining table (1m apart) and conversing in a normal tone for an hour. What is the numerical risk of infection for the uninfected party in each case: "High", "Low", and "Very Low"? How do we know these numbers, and how confident in them are we? And how do the "High" risks cases compare to the case not shown where neither party is wearing a mask?

caseysoftware 6y ago
They left the "info" out of the infographic. I was hoping for some sort of information or data from this one.. as in even a single citation to a study to read.
- GordonS 6y ago
  I was going to say exactly the same thing! I personally think wearing a mask indoors around others is a good idea, but this "graphic" isn't going to convince anyone - it just states vague facts without numbers or references.
- leereeves 6y ago
  There actually is a citation buried in the text "Wearing a mask significantly reduces the chances of spreading COVID-19 from you to others" "From you to others" is a link to a preprint by fast.ai titled Face Masks Against COVID-19: An Evidence Review Direct link: http://files.fast.ai/papers/masks_lit_review.pdf http://files.fast.ai/papers/masks_lit_review.pdf
tomohawk 6y ago
There's the hamster test https://www.straitstimes.com/asia/east-asia/hamster-tests-show-masks-reduce-coronavirus-spread-scientists https://www.straitstimes.com/asia/east-asia/hamster-tests-sh... Implies 60% protection of others when wearing a mask, and 30% protection of yourself.
- DanBC 6y ago
  60% meaning what though?
DanBC 6y ago
No-one knows. Masks may help, and if people can wear masks they probably should, but the evidence we have so far isn't great. If masks were strongly protective it would be easy to see this effect in RCT, and we've done a bunch of trials of masks and respiratory disease and it's difficult to see the benefit. Distancing and hand-washing remain important, and if people are focussing on masks but lapsing on hand-hygiene and distancing then we're probably going to see a rise in infections. If we assume 20% of the population have asymptomatic covid, and that masks reduce risk by 40% then about 200,000 people have to wear masks to prevent one extra infection. (Page 18) https://www.fhi.no/globalassets/dokumenterfiler/rapporter/2020/should-individuals-in-the-community-without-respiratory-symptoms-wear-facemasks-to-reduce-the-spread-of-covid-19-report-2020.pdf https://www.fhi.no/globalassets/dokumenterfiler/rapporter/20...
- nickthemagicman 6y ago
  What's RCT?
  - nkurz 6y ago
    Randomized Control Trial: https://en.wikipedia.org/wiki/Randomized_controlled_trial https://en.wikipedia.org/wiki/Randomized_controlled_trial

by nkurz 6y ago

caseysoftware 6y ago

They left the "info" out of the infographic. I was hoping for some sort of information or data from this one.. as in even a single citation to a study to read.

GordonS 6y ago
I was going to say exactly the same thing! I personally think wearing a mask indoors around others is a good idea, but this "graphic" isn't going to convince anyone - it just states vague facts without numbers or references.
leereeves 6y ago
There actually is a citation buried in the text "Wearing a mask significantly reduces the chances of spreading COVID-19 from you to others" "From you to others" is a link to a preprint by fast.ai titled Face Masks Against COVID-19: An Evidence Review Direct link: http://files.fast.ai/papers/masks_lit_review.pdf http://files.fast.ai/papers/masks_lit_review.pdf

tomohawk 6y ago

There's the hamster test https://www.straitstimes.com/asia/east-asia/hamster-tests-show-masks-reduce-coronavirus-spread-scientists https://www.straitstimes.com/asia/east-asia/hamster-tests-sh... Implies 60% protection of others when wearing a mask, and 30% protection of yourself.

DanBC 6y ago
60% meaning what though?

DanBC 6y ago

No-one knows. Masks may help, and if people can wear masks they probably should, but the evidence we have so far isn't great. If masks were strongly protective it would be easy to see this effect in RCT, and we've done a bunch of trials of masks and respiratory disease and it's difficult to see the benefit. Distancing and hand-washing remain important, and if people are focussing on masks but lapsing on hand-hygiene and distancing then we're probably going to see a rise in infections. If we assume 20% of the population have asymptomatic covid, and that masks reduce risk by 40% then about 200,000 people have to wear masks to prevent one extra infection. (Page 18) https://www.fhi.no/globalassets/dokumenterfiler/rapporter/2020/should-individuals-in-the-community-without-respiratory-symptoms-wear-facemasks-to-reduce-the-spread-of-covid-19-report-2020.pdf https://www.fhi.no/globalassets/dokumenterfiler/rapporter/20...

nickthemagicman 6y ago
What's RCT?
- nkurz 6y ago
  Randomized Control Trial: https://en.wikipedia.org/wiki/Randomized_controlled_trial https://en.wikipedia.org/wiki/Randomized_controlled_trial