Coronavirus live news: Trump will 'absolutely' encourage Americans to take Covid vaccine, says press secretary

In the UK, vaccinating the population against Covid-19 will cost up to £12bn, Whitehall’s spending watchdog has disclosed, amid details of tensions between health bodies over the rollout.

The National Audit Office said the government would spend up to £11.7bn on purchasing and manufacturing Covid-19 jabs for the UK before deploying them in England.

A report released on Wednesday reveals officials from Public Health England complained that they had been cut out of key decisions despite having previous experience of vaccine delivery programmes: