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A side-by-side comparison of the Pfizer/BioNTech and Moderna vaccines

In an ideal world, a pandemic vaccine could be delivered in a single shot, so supplies could be stretched to cover a lot of people. It would trigger no side effect more significant than a sore arm. And it would be easy to ship and store.

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Why you still need to wear a mask after getting COVID-19 vaccine

As the promise of a COVID-19 vaccine is fulfilled amid the rollout of the Pfizer/BioNTech and Moderna vaccines, the need to continue wearing masks, washing your hands and maintaining social distancing remains mission critical to protecting lives.

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Coronavirus Variant Is Indeed More Transmissible, New Study Suggests

A team of British scientists released a worrying study on Wednesday of the new coronavirus variant sweeping the United Kingdom. They warned that the variant is so contagious that new control measures, including closing down schools and universities, might be necessary. Even that may not be enough, they noted, saying, “It may be necessary to greatly accelerate vaccine rollout.”

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What the data say about border closures and COVID spread

As countries in Europe rush to close their borders to the United Kingdom to prevent transmission of a new — and potentially more transmissible — variant of SARS-CoV-2, research has estimated the effect of international travel restrictions on COVID-19 spread earlier in the pandemic.

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Can Travel Bans Really Stop the Spread of Coronavirus Variants? Experts Are Skeptical

LONDON — As nation after nation rushed this week to close their borders with Britain, the moves brought back memories of the way the world reacted after the coronavirus first emerged broadly in the spring. Most of those initial travel prohibitions came too late, put in place after the virus had already seeded itself in communities far and wide.

This time, with countries trying to stop the spread of a new, possibly more contagious coronavirus variant identified by Britain, it may also be too late. It is not known how widely the variant is already circulating, experts say, and the bans threaten to cause more economic and emotional hardship as the toll wrought by the virus continues to grow.

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