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Scientists have found 21 viral offspring linked with BA.2 that may outpace the most successful subvariant of Omicron variant so far.

Japan’s health ministry on Tuesday formally approved Novavax’s Covid-19 vaccine, a fourth foreign-developed tool to combat the infections as the country sees signs of a resurgence led by a subvariant of fast-spreading omicron.

The International Monetary Fund on Tuesday slashed its forecast for global economic growth by nearly a full percentage point, citing Russia’s war in Ukraine, and warning that….