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Moderna says its new 'bivalent' vaccine shows promise against COVID variants

A health care worker prepares the current COVID vaccine booster shots from Moderna in February. The company says a bivalent vaccine that combines the original strain with the omicron strain is the lead candidate for a fall vaccination campaign. (Bloomberg via Getty Images)
A health care worker prepares the current COVID vaccine booster shots from Moderna in February. The company says a bivalent vaccine that combines the original strain with the omicron strain is the lead candidate for a fall vaccination campaign. (Bloomberg via Getty Images)

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