What you need to know about the coronavirus right now

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fairly difficult
The United States is developing a "new system for international travel" that will include contact tracing for when it eventually lifts travel restrictions...
(Reuters) - Here's what you need to know about the coronavirus right now:

White House plans new system for international travel

that bar much of the world's population, a senior White House official said on Wednesday.

White House coronavirus response coordinator Jeff Zients said the plan would replace the current restrictions and would be "safer, stronger and sustainable."

Booster shot generates higher immune response

U.S. Food and Drug Administration scientists said on Wednesday that booster doses of Pfizer's COVID-19 vaccine may not be needed, even though the third shot generates a higher immune response in recipients.

New data from Moderna Inc's large COVID-19 vaccine trial shows that the protection it offers wanes over time, supporting the case for booster doses, the company said in a news release on Wednesday. Data from several recent studies suggests Moderna's vaccine protection lasts longer than a similar shot from Pfizer Inc and German partner BioNTech SE.…
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