Trucks on Sunday began shipping millions of doses of Covid-19 vaccine in the United States, part of an enormous logistics operation that should see some vulnerable people being vaccinated as early as Monday in the nation worst hit by the coronavirus.

The US green lighted the Pfizer-BioNTech Covid-19 vaccine late Friday, paving the way for millions of vulnerable people to receive their shots in the world's hardest-hit country.

President Donald Trump immediately released a video on Twitter, where he hailed the news as a "medical miracle" and said the first immunizations would take place "in less than 24 hours."

South Korea on Saturday reported its highest daily number of coronavirus cases so far, with a surge centred on the capital region sparking fears the country could lose control of the spread.

Peru has temporarily suspended clinical trials of a Covid vaccine made by Chinese drug giant Sinopharm after detecting neurological problems in one of its test volunteers.

Pharmaceutical giant AstraZeneca's Russian branch said Friday it would use part of Russia's homemade Sputnik V vaccine in further clinical trials. 

Germany's trend of new infections has taken a worrying turn, the head of its disease control agency said Thursday, as the death toll to date crossed the grim milestone of 20,000.

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The Czech government extended a state of emergency until December 23 on Thursday as the number of Covid-19 infections in the EU member started to surge again.

Pfizer's COVID-19 vaccine faces one final hurdle as it races to become the first shot greenlighted in the U.S.: a panel of experts who will scrutinize the company's data for any red flags.

Thursday's meeting of the Food and Drug Administration's vaccine advisory panel is likely the last step before a U.S. decision to begin shipping millions of doses of the shot, which has shown strong protection against the coronavirus.

Britain and Canada have already approved the Pfizer-BioNTech Covid-19 vaccine -- will the United States be next?