Mounting evidence from animal studies suggests that Omicron does not multiply readily in lung tissue, which can be badly damaged in people infected with other variants
A doctor in Uzhhorod, Ukraine, examines the lungs of a person with COVID-19. The Omicron variant might affect the lungs less than do previously circulating variants.Early indications from South Africa and the United Kingdom signal that the fast-spreading Omicron variant of the coronavirus SARS-CoV-2than its predecessor Delta.
“It’s a very attractive observation that might explain what we see in patients,” says Melanie Ott, a virologist at the Gladstone Institute of Virology in San Francisco, California, who was not involved in the research. But she adds that Omicron’s hyper-transmissibility means that hospitals are filling quickly — despite any decrease in the severity of the disease it causes.
Authorities in South Africa announced on 30 December that the country had passed its Omicron peak without a major spike in deaths. And a 31 December UK government said that people in England who were infected with Omicron were about half as likely to require hospitalization or emergency care as were those infected with Delta.
But the number of people who have gained immune protection against COVID-19 through vaccination, infection or
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