I’ve checked a few of the studies reviewed. Most are in households.
Face masks, which *reduce* and *slow down* air flow without *stopping* it, are least effective with long exposure times, such as households.
That doesn’t mean that they’re ineffective eg at the supermarket.
Face masks, which *reduce* and *slow down* air flow without *stopping* it, are least effective with long exposure times, such as households.
That doesn’t mean that they’re ineffective eg at the supermarket.
https://twitter.com/vprasadmdmph/status/1459015945473572865
Some red flags from some of the studies:
- “non-fit mask were used”
- “participants lived in university residence halls” – unless they wore masks also during dinner, transmission could have occurred then
- “non-fit mask were used”
- “participants lived in university residence halls” – unless they wore masks also during dinner, transmission could have occurred then
This review is bullshit. It’s like studying whether car brakes work and including incidents where the driver was using his phone and didn’t brake
You can think of face masks as winter jackets.
If you wear one and spend a day in the cold you’ll freeze to death. That doesn’t mean that the winter jacket isn’t useful while staying outside for a couple of hours.
Long-term exposure doesn’t tell much about short-term protection
If you wear one and spend a day in the cold you’ll freeze to death. That doesn’t mean that the winter jacket isn’t useful while staying outside for a couple of hours.
Long-term exposure doesn’t tell much about short-term protection
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