Omicron 'dangerous', especially for unvaccinated: WHO

The WHO said the huge global spike in cases was being driven by Omicron but insisted there should be no surrender to the variant of concern.

"While Omicron causes less severe disease than Delta, it remains a dangerous virus, particularly for those who are unvaccinated," WHO chief Tedros Adhanom Ghebreyesus told a press conference.

"We mustn't allow this virus a free ride or wave the white flag, especially when so many people around the remain unvaccinated.

"In Africa, over 85 per cent of people are yet to receive a single dose of vaccine. We can't end the acute phase of the pandemic unless we close this gap."

Tedros wanted every country to have 10 per cent of their population vaccinated by the end of September 2021, 40 per cent by the end of December, and 70 per cent by mid-2022.

But 90 countries had still not reached 40 per cent, 36 of them still short of the 10-per cent mark, he said.

The "overwhelming majority" of people admitted to hospitals around the world were unvaccinated, he added.

While vaccines remain very effective at preventing death and severe COVID-19 disease, they do not fully prevent transmission, said Tedros.

"More transmission means more hospitalisations, more deaths, more people off work including teachers and health workers and more risk of another variant emerging that is even more transmissible and more deadly than Omicron."

Tedros said that the numbers of deaths worldwide had stabilised at around 50,000 per week.

"Learning to live with this virus does not mean we can, or should, accept this number of deaths," he said.