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How vaccine-makers plan to address the new COVID-19 omicron variant

A person waits to be tested for COVID-19 in Johannesburg, South Africa, on Saturday. The omicron variant, first identified in South Africa, has been confirmed in several countries. (Jerome Delay/AP)
A person waits to be tested for COVID-19 in Johannesburg, South Africa, on Saturday. The omicron variant, first identified in South Africa, has been confirmed in several countries. (Jerome Delay/AP)

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