Most important: omicron appears to do less harm to the lungs, where previous variants would often cause scarring and lead to serious difficulty breathing for many patients.
The animal studies show that omicron typically stays in the windpipe and upper respiratory tract: it doesn't make its way down deep into the lungs like delta.
After months of scientists' infecting cells in Petri dishes and spraying the virus into the noses of animals, scientists have learned a little more about omicron.
Although the animals infected with Omicron on average experienced much milder symptoms, the scientists were particularly struck by the results in Syrian hamsters, a species known to get severely ill with all previous versions of the virus.
Omicron levels in the lungs were one-tenth or less of the level of other variants.
In 12 lung samples, the researchers found that Omicron grew more slowly than Delta and other variants did.
Higher in the airway, cells tend not to carry the protein, which might explain the evidence that Omicron is found there more often than the lungs.
https://www.zerohedge.com/covid-19/scientists-shed-new-light-what-makes-omicron-spread
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