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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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Covid: 'More deadly' UK variant claim played down by UK scientists, Anericans say more data needed

Scientists say signs a new coronavirus variant is more deadly than the earlier version should not be a "game changer" in the UK's response to the pandemic.

Boris Johnson has said there is "some evidence" the variant may be associated with "a higher degree of mortality".

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