Efforts to develop an effective vaccine are continuing, but the World Health Organization warns the death toll could hit two million before one is widely available
It expects widespread vaccinations against Covid-19 to begin in mid-2021 at the earliest
"At no point has Russia been under threat from Nato" says White House Press Secretary Jen Psaki, in response to President Putin putting Russia's nuclear forces on "special alert"
The potential new vaccine for Covid-19 has been making headlines around the world
Here’s what you need to know about what it might mean for you #BBCYourQuestions
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