Highly sensitive laser light scattering observations have revealed that loud speech can emit thousands of oral fluid droplets per second. In a closed, stagnant air environment, they disappear from the window of view with time constants in the range of 8 to 14 min, which corresponds to droplet nuclei of ca. 4 μm diameter, or 12- to 21-μm droplets prior to dehydration. These observations confirm that there is a substantial probability that normal speaking causes airborne virus transmission in confined environments.
It has long been recognized that respiratory viruses can be transmitted via droplets that are generated by coughing or sneezing. It is less widely known that normal speaking also produces thousands of oral fluid droplets...
This makes sense, and now science is backing it up. (So much for early claims that it's not spread through the air).
The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission | PNAS
This is news?This makes sense, and now science is backing it up. (So much for early claims that it's not spread through the air).
The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission | PNAS
This makes sense, and now science is backing it up. (So much for early claims that it's not spread through the air).
The airborne lifetime of small speech droplets and their potential importance in SARS-CoV-2 transmission | PNAS
Yes. That is why wearing a mask is more to protect others from you than protecting yourself. The only kind of mask that would protect you would be a properly-fitted N95 mask- something not even most ER docs and nurses working on the front lines can get.
This is news?
Apparently not, my wife read an article on how a double cloth mask, is up to 90% efficient.....I'd have to find it to read it myself, but that is what she told me.
It's not a point I care to debate, but it was my understanding that there was speech transmission pretty much from the get-go, something I was aware of since at least mid-March. Well anyway, now you know.It is to many at least, including me in terms of the science; if you can show me the headlines about 'ordinary speech' being a transmission shown by science, I hadn't seen it. Of course I've felt it's the case, which is different than it being publicized and having a study.
It's not a point I care to debate, but it was my understanding that there was speech transmission pretty much from the get-go, something I was aware of since at least mid-March. Well anyway, now you know.
Can't understand why people aren't being more cautious about putting their hands all over shopping carts hundreds of other people have used, unloading groceries from them and then eating food, including produce, etc., which has had contact with the cart - I feel like this could be much more likely to spread COVID than people talking
Because people wash their hands when they get home from shopping?
Perhaps, but 10% exposure to thousands of droplets per second doesn't sound super safe. Having those droplets caught by the speaker wearing a mask seems much more effective - but this also goes back to the issue of your hands being exposed and then you touching your mouth/nose/eyes.
And they can't be infected anytime between the time they put their hands all over the cart and the time they get home and wash their hands? They've already touched the steering wheel, car door handle, etc., and some people have a long ride home
Well, first of all, most people use hand sanitizer, second of all, im not sure about you, but I know I don't put my face on the steering well, car door handle, etc..... that **** is on the surface, it's not gonna magically rise up and come to you.
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