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Warning of Shortages, Researchers Look to Stretch Vaccine Supply

WASHINGTON — Federal officials and drugmakers, faced with a slower-than-expected rollout of the coronavirus vaccine, are racing to find ways to expand the supply, looking at lowering the required dosage and extracting more doses from the supplies they have.

Just weeks into the vaccine program, scientists at the National Institutes of Health and the drugmaker Moderna are analyzing data to see if they can double the supply of the company’s coronavirus vaccine by cutting doses in half. The study, though long planned, is increasingly urgent in the face of looming shortages as the country tries to fight off a surging pandemic.

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UPDATE: U.S. and ovrseas developments.

BALTIMORE, M.D. — The COVID-19 death toll in the United States has surpassed 350,000 as experts anticipate another surge in coronavirus cases and deaths stemming from holiday gatherings over Christmas and New Year’s.

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Canada will require incoming international air passengers to test negative before boarding, and other news from around the world

https://www.nytimes.com/live/2021/01/02/world/covid-19-coronavirus#canada-will-require-incoming-international-air-passengers-to-test-negative-before-boarding-and-other-news-from-around-the-world

Canada will require passengers seeking to board international flights into the country to show their airline proof of a negative coronavirus test, in addition to entering an already existing, mandatory 14-day quarantine on arrival.

The new rule, which the government announced on Thursday, will take effect on Jan. 7 and will require proof of a negative PCR test taken in the previous 72 hours. PCR tests must be sent to a lab and can take several days to process, unlike the rapid antigen test, which gives a result in about 30 minutes.

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Explanations for ‘long Covid’ remain elusive. Research in early stages

Nearly a year into the coronavirus pandemic, the perplexing problems of Covid-19 long-haulers seem no nearer resolution — or even explanation — than when they first puzzled doctors and patients in the spring.

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