The CDC says that “less than 10%” of Covid transmission occurs outdoors.
Which sounds like a lot of outdoors transmission. If anything close to 10% was correct, it would mean thousands of deaths were from outdoors transmission.
But the number doesn’t stand up to scrutiny. 
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At very close distance, (0.2 to 0.5 meter) you *are* spraying people a bit more with larger particles, and the smaller aerosols are more concentrated there, too (will dilute quickly outdoors but at first that' where they are.) See correct graphic:pic.twitter.com/z13WXEH33m
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I wonder if we'll ever know how efficient Kumbha Mela in India has been in outside transmission. Certainly a superspreader event of epic, subcontinental proportions.
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Meals & smoke breaks are also times when construction workers in Singapore are close together & unmasked. I see it three times a week, while running at lunchtime. I’m also unmasked but moving fast, not stopping to chat, & masking up for underpasses.
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