The World Health Organisation has said a shortfall in Covid-19 vaccine doses going through the Covax programme in June and July could undermine the efficiency of the roll-out.

Covax was set up to ensure equitable distribution of vaccines, particularly to low-income countries, and has already delivered more than 80 million doses to 129 territories.

But that is “about 200 million doses behind where we want to be”, Bruce Aylward, the WHO's Covax frontman, told reporters in Geneva.

“We are setting up for failure if we don't get early doses. We are not on track yet: we don't have enough doses from enough countries early enough to get the world on track to get out of this,” Aylward said.