BBC News
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image captionBoris Johnson speaks to G7 leaders by video link
Boris Johnson is pledging to donate most of the UK s surplus vaccine supply to poorer countries in a speech to a virtual G7 meeting on Friday.
He urged rich countries to back a 100-day target for the developing new vaccines for future emerging diseases.
The UK has ordered more than 400 million doses of various vaccines, so many will be left over once all adults are vaccinated.
But anti-poverty campaigners say the UK is not doing enough.
Decisions on when and how much of the surplus will be distributed will be made later this year, with ministers taking into account the supply chain and whether booster shots are needed in the autumn.
Covid vaccines: G7 increase support for Covax scheme bbc.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from bbc.co.uk Daily Mail and Mail on Sunday newspapers.
Covid vaccines: G7 increase support for Covax scheme bbc.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from bbc.com Daily Mail and Mail on Sunday newspapers.