The CDC announced in April that a majority of COVID-19 transmission happens indoors, with "Less than 10 percent of documents transmission" occurring outdoors.
The NYT reported the number is misleading and is based on a misclassification of how some cases of the virus were spread. Virologist at the University of St. Andrews Dr. Muge Cevik said the number "Seems to be a huge exaggeration," according to the NYT. The NYT reports outdoor transmission appears to be less than one percent and could even be lower than 0.1 percent.
The method the CDC used to come up with 10% figure is reportedly skewed since it is based on a large number of outdoor transmission cases that occurred at construction sites in Singapore.
Another study cited by the NYT found that four out of 103 cases were classified as having occurred from outdoor transmission and all four cases were from Singapore construction sites.
Other studies have found the rate of outdoor transmission could be far lower than 10% as well, with a study from Ireland "Which seems to have been more precise about the definition of outdoors," putting outdoor transmission at 0.1 percent, according to the report.
The CDC later told the NYT the 10% figure is "a conservative estimate from a recent systematic review of peer-reviewed papers," and that "The data we do have supports the hypothesis that the risk of outdoor transmission is low."
A string of studies also recently found that with low outdoor transmission, outdoor mask mandates should be reduced.
https://dailycaller.com/2021/05/11/cdc-outdoor-transmission-misleading-coronavirus/
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