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Three questions and the emerging answers about COVID-19 Vaccine protection--NPR

As the COVID-19 vaccine rolls out, three big questions loom. First, can someone who has been vaccinated still spread the disease? Second, will the vaccine remain effective as the virus itself evolves? And third, how long will the vaccine's protection last?

Answers to these questions lie in our immune systems. And the answers aren't straightforward because our immune systems are both remarkably adept and remarkably challenging to predict.

...the first question, about whether people who are vaccinated can still spread the disease. Marion Pepper, an immunologist at the University of Washington, says that's not just an open question for this vaccine, but for vaccines in general.

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EU kicks off debate on vaccine travel certificates

BRUSSELS (Reuters) - European Union countries kicked off a debate on Monday on whether people who have received a COVID-19 vaccine should have greater freedom to travel in the summer than those not immunized.

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A Nationwide Mask Mandate Could Add $1 Trillion To The US GDP, According To UCLA Analysis

Implementation of a nationwide mask mandate, combined with complementary public health measures, could reduce the coronavirus’ spread to essentially zero and have a potential $1 trillion impact on the U.S. GDP, according to researchers at UCLA Fielding School of Public Health.

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A new COVID-19 challenge: Mutations rise along with cases

The race against the virus that causes COVID-19 has taken a new turn: Mutations are rapidly popping up, and the longer it takes to vaccinate people, the more likely it is that a variant that can elude current tests, treatments and vaccines could emerge.

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