Scientists in South Africa, where the Omicron variant was first discovered last month, said existing vaccines should still protect against severe disease and death. The three Omicron cases identified in the U.S. also all displayed mild symptoms.
Scientists in South Africa, where the Omicron variant was first discovered last month, said existing vaccines should still protect against severe disease and death. The three Omicron cases identified in the U.S. also all displayed mild symptoms.
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