Call for ‘solidarity’ in Covid fight as Boris Johnson calls on world leaders to help vaccinate global population by end of 2022

Progress on climate change could be scuppered by developing nations if they are not given equitable access to vaccines, Boris Johnson has been warned, as rich nations come under new pressure to donate more doses.

Figures compiled by the Observer show that the wealthiest nations, including the UK, have enough vaccines to inoculate their populations more than twice over.