“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 world remain unvaccinated.”

The “overwhelming majority” of people admitted to hospitals are unjabbed, he added.

The virus is well on its way to becoming endemic -- but we’re not there yet
Maria Van Kerkhove, WHO’s technical lead on Covid-19

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.

Vaccine inequity

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 have still not reached 40 per cent -- with 36 of them still short of the 10-per cent mark, he said.

“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,” said Tedros.

Wealthier countries had made it “three times as hard” for dose-starved low-income nations by exporting misinformation rather than vaccines, said Bruce Aylward, the WHO’s frontman on accessing coronavirus tools.

The WHO says Omicron had been identified in 149 countries by 6 January.

Some hope that due to its increased transmissibility, Omicron will replace more severe variants and see Covid-19 shift from a pandemic into an endemic disease that is more manageable.

But WHO emergencies director Michael Ryan said: “This is not the time to declare this is a welcome virus.”

Maria Van Kerkhove the WHO’s technical lead on Covid-19, said it was difficult to predict the road ahead and Omicron was unlikely to be the last variant preoccupying minds at the UN health agency.

“We expect the virus will continue to evolve and become more fit... we expect to see outbreaks among unvaccinated individuals,” she said.

“The virus is well on its way to becoming endemic -- but we’re not there yet.”

Meanwhile Tedros said pregnant women were not at higher risk of catching Covid-19, but were at higher risk of developing severe disease if they did so.

He called for pregnant women to have access to vaccines, and to be included in trials for new treatments and jabs.

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