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Ceiling

>Where is the evidence that her wearing a mask would have changed the outcomes?

There is multiple studies that show masks are effective at _slowing down_ the spread.

>It either works or it does not.

Huh? This is like saying, "chemotherapy works or it does not."

>Sorry, does not take much to see that, just simply look at everyday observations.

Yep. I'm looking. There's mass deaths a day. Funny the activity is in the anti-mask states, huh?

>yet NONE have exhibited anything close to the 91% infection rates

The CDC said 91% of kids live in high risk places... it has nothing to do with the infection rate. You need to _read_ sources and not just emotionally react.

https://www.cbsnews.com/video/report-91percent-of-students-l...

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> There's mass deaths a day. Funny the activity is in the anti-mask states, huh?

I suggest you look at the actual data - no such correlation exists.

The majority of US states have similar death rates per population at around 2K deaths per 1M citizens. (with a spread of around +/- 15%) You can find examples for each,

Death rates correlate much better to wealth and way of living than local policies.

> The majority of US states have similar death rates per population at around 2K deaths per 1M citizens. (with a spread of around +/- 15%)

The range is actually about 40 to 300 per 100K (or 400 to 3000 per million), but what the upthread claim seems to be about is the recent death rate, not the total death rate. No one I can find reports that per capita, but I suspect it has even more variation (California is about middle of the road for total deaths, but was an early leader with its population centers hit really hard at the beginning of the pandemic, while a number of the places in the South that weren't hit hard initially have gotten up near the top in total deaths per capita.)

There are lots of models, but the only study I’m aware of showed that blue surgical masks had ≈10% efficacy when worn correctly, with cloth masks and gaiters less effective.

Additional ventilation seemed to have better efficacy.

The chart I saw showed that masks are somewhat effective for ingress and somewhat effective for egress contamination. When both parties are wearing the mask, and are social distancing, etc, the effectiveness goes up considerably.

The only singular control that works in a vacuum is a vacuum. So unless you are working in a vacuum, you need to stack controls in your favour. Just like you do in every other situation in life.

I've only ever seen them saying problems with school environments amount to a lack of good air circulation with people breathing the same air in and out amongst themselves for hours at a time. That's exactly what the CDC and everyone else has said to avoid doing, and why the phone apps rate 15 minutes of close proximity as enough exposure to warrant a test.

Just like with rubbing alcohol, time and amount have to be taken into account. Water will put out nearly any household fire. But only if other controls accompany it, and there is enough of that water for enough time to have the desired effect.

She took her mask off to read. They were all in that contaminated environment for most of the day. There is every reason to expect infections in such an environment.

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