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308 View comments [Omicron](/news/omicron-variant/index.html) could have jumped into humans from mice, scientists say. The mysterious origin of the heavily-mutated Covid variant that triggered global panic only a month ago continues to puzzle experts. But Chinese scientists now say they may have unearthed evidence linking the mutant strain to mice — in its DNA. Analysis showed the variant carries mutations that make it better at infecting the animal group — which previous research has shown can catch Covid from humans. And that it has many more mutations than any other mutant strains, which the scientists held up as yet more proof...
