New cases in Namibia, Sierra Leone, Liberia and Rwanda have doubled in the last week, World Health Organization emergencies programme head Mike Ryan said, while vaccine access remains miniscule.
A total of 1,132,546 individuals have received one dose of a Covid-19 vaccine, while 790,071 have received two.
NON-ESSENTIAL travel over the Irish border could be prohibited in the coming weeks due to the concerning rise of the Delta variant on the island of Ireland.
It came as the Prime Minister said he is "very confident" that the remaining coronavirus restrictions in England will be lifted on July 19.
The WHO says there's no clear timeline on when more vaccines will be available, but there is an urgent need for them.
Govt's AEFI panel confirms first death after Covid vaccination in India
He said at least 70% of the world's population needed to be vaccinated against Covid-19 to end the pandemic. This is a great achievement reflecting public trust in the Covid-19 vaccines and the whole process.
Data shows an increased risk of hospitalisation with Delta compared to Alpha, although Public Health England's analysis shows that two doses of vaccine give a high degree of protection against hospitalisation, estimated to be more than 90%.
All provinces are warning against the existence of Delta.
Data on the variant in Canada, however, is limited and it hasn't yet been added to the Health Canada website reporting variant cases.
A study published by the Office for National Statistics (ONS) on Thursday revealed that young people, healthcare workers and non-white people are among those most likely to test positive for COVID-19 after being vaccinated.
PHE said there is now no evidence that the Delta VOC, or any other VOCs, are more likely to cause reinfection than others, but that it continues to closely monitor this and other reinfection data.
"There are obviously some issues we need to work on", he said, noting there "are probably more cases" than we have seen reported.