Coronavirus live news: half of US adults receive one vaccination; Turkey sees record deaths

Nearly a third of US adults now fully vaccinated; Ankara records 318 deaths in 24 hours

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11.26pm BST

Here the latest key developments at a glance:

11.18pm BST

Venezuelan president Nicolas Maduro said on Sunday that the government will on Monday make its second payment to the COVAX initiative to access some 11 million coronavirus vaccines.

Earlier this week Venezuela's government said it wants funds frozen in the US to be used to pay for vaccines and will keep working with the opposition to negotiate this payment.