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Novavax COVID-19 vaccine works, but less so against variants

Novavax Inc. said Thursday that its COVID-19 vaccine appears 89% effective based on early findings from a British study and that it also seems to work — though not as well — against new mutated versions of the virus circulating in that country and South Africa.

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Emerging Coronavirus Variants May Pose Challenges to Vaccines

The steady drumbeat of reports about new variants of the coronavirus — first in Britain, then in South Africa, Brazil and the United States — has brought a new worry: Will vaccines protect against these altered versions of the virus?

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