But colonies of normal bacteria from my mouth/throat show the spread of large respiratory droplets, like the kind we think mostly spread #COVID19, and how a mask can block them!
The take home: masks matter!
We wash hands after using the bathroom & wipe noses on tissues. Masks/face shields need to be just another normalized act of hygiene. #MasksWork
I'll circle back later tonight to answer questions. Thanks everyone!
I actually got a packet of pepper from the cafeteria to try to make myself sneeze - didn't work, just got watery eyes. So I just did a fake stage-sneeze at the plate.
Literally spitting verses ...
So it's not a bad idea but I would honestly expect the outcome of THIS demonstration to be essentially the same and here's why...
DOES SHOW: the act of talking (or coughing, sneezing, singing) causes particles of liquid to come out of your mouth.
DOES SHOW: those droplets can carry microbes like bacteria
DOES SHOW: a mask blocks most of those
DOES NOT SHOW: could these droplets carry viruses (like SARS-CoV-2), does a mask block THOSE
(Based on what we know you can intuit/infer this, but it's not shown)
To me this is purely a demonstration bc 1) it was just one single data point and 2) I essentially knew the outcome going in
I used a surgical mask from a hospital. Would a homemade mask do the same and keep mouth bacteria from the plates? Certainly.
- disposable paper mask
- hospital surgical mask
- homemade fabric mask
- N95 mask
to reduce virus transmission, I wouldn't do what I did here, which is see how well a mask blocks minute bits of spit using # of bacteria as a proxy
A mask preventing your spit & breath from flying out of your mouth, even if doesn't catch it all, will stop some spread of bacteria (see here) AND LIKELY VIRUS (not seen here)
It was "Dear Theodosia" from Hamilton, top of my lungs.
If I could have anyone's singing talent it would be Leslie Odom Jr.'s. (Spoiler: I don't.)
But since we expect respiratory droplets to be what primarily spreads #COVID19, I exploit the presence of (easily to grow and visualize) bacteria in respiratory droplets, to show where they go.
Would it "prove" that singing can really spread droplets? I think we already know that's the case: cnn.com/2020/05/13/us/…
A mask sitting on top of a plate will certainly block any droplets that come flying at it. But a person breathing in droplets coughed out by another person? Different story.
I don't think a bacteria plate-based readout would answer the real question which is "where do THOSE exhalations/droplets go?" I don't know but it won't be out in front.
There are replies to a few often-repeated questions in the above thread but a lot of these keep getting re-asked. If you've asked something new, chances are good I'll miss it because, yikes, this got pretty big.