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Vaccinations

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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STUDY: Why Vaccines Alone Will Not End the Pandemic

The coronavirus pandemic in the United States has raged almost uncontrollably for so long that even if millions of people are vaccinated, millions more will still be infected and become ill unless people continue to wear masks and maintain social distancing measures until midsummer or later, according to a new model by scientists at Columbia University.

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C.D.C. Eases Coronavirus Vaccine Rules for ‘Exceptional Circumstances’

WASHINGTON — The Centers for Disease Control and Prevention has quietly changed its recommendations for coronavirus immunizations to give doctors the flexibility to handle “exceptional circumstances,” a spokeswoman said, even though the changes have not been studied in large clinical trials.

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