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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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What do coronavirus variants mean for your masks?

Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, said that when it comes to wearing two masks to protect against the coronavirus, it "makes common sense" that more than one layer of masking would be more effective.

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As Virus Grows Stealthier, Vaccine Makers Reconsider Battle Plans

As the coronavirus assumes contagious new forms around the world, two drug makers reported on Monday that their vaccines, while still effective, offer less protection against one variant and began revising plans to turn back an evolving pathogen that has killed more than two million people.

The news from Moderna and Pfizer-BioNTech underscored a realization by scientists that the virus is changing more quickly than once thought, and may well continue to develop in ways that help it elude the vaccines being deployed worldwide.

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