CDC has been dramatically overstating outdoor transmission

CDC has been dramatically overstating outdoor transmission
CDC's Roybal Campus in Atlanta. Wikipedia: By James Gathany, Centers for Disease Control and Prevention - https://www.cdc.gov/media/subtopic/library/building.htm, Public Domain, Link

[Ed. – No wonder so many people are confused about who to believe and what action to take.]

When the Centers for Disease Control and Prevention released new guidelines last month for mask wearing, it announced that “less than 10 percent” of Covid-19 transmission was occurring outdoors. Media  organizations repeated the statistic, and it quickly became a standard description of the frequency of outdoor transmission.

But the number is almost certainly misleading.

It appears to be based partly on a misclassification of some Covid transmission that actually took place in enclosed spaces (as I explain below). An even bigger issue is the extreme caution of C.D.C. officials, who picked a benchmark — 10 percent — so high that nobody could reasonably dispute it.

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That benchmark “seems to be a huge exaggeration,” as Dr. Muge Cevik, a virologist at the University of St. Andrews, said. In truth, the share of transmission that has occurred outdoors seems to be below 1 percent and may be below 0.1 percent, multiple epidemiologists told me.

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