Russia's Sputnik V coronavirus vaccine gives around 92% protection against Covid-19, late stage trial results published in The Lancet reveal.
Public Health England is investigating cases of coronavirus with 'worrying' new genetic changes that have been found in some regions of the UK.
Israel's vaccination programme is showing signs of working to drive down infections and illness in the over-60s.
The EU says UK-Swedish drug firm AstraZeneca will now supply an additional nine million Covid vaccine doses by March, after days of criticism of the bloc's vaccination programme.
A new single-dose vaccine has shown to be 66% effective against Covid-19, and offered complete protection against hospitalisation and death in trials.
A year ago, the Chinese government locked down the city of Wuhan. For weeks beforehand officials had maintained that the outbreak was under control - just a few dozen cases linked to a live animal market. But in fact the virus had been spreading throughout the city and around China.
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The number of people to have died with coronavirus in the UK has exceeded 100,000.
Moderna's Covid vaccine appears to work against new, more infectious variants of the pandemic virus found in the UK and South Africa, say scientists from the US pharmaceutical company.
New Zealand has reported its first case of Covid-19 outside of a quarantine facility in more than two months.
Scientists tracking the spread of coronavirus in England say infection levels in the community may have risen at the start of the latest lockdown.
