UK PM to push for world vaccination by end of 2022

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Prime Minister Boris Johnson will urge leaders of other wealthy countries to commit to vaccinating the world against Covid-19 by the end of next year.

He will lay out a target for global vaccination at a summit of the G7 group of advanced economies on Friday.

The US, France, Germany, Italy and Japan have all said how many doses they will donate to the global vaccine programme, Covax.

But the UK and Canada are yet to put