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Omicron spreads faster than any other variant, WHO says. It's now in 77 countries

CHESTER, ENGLAND - DECEMBER 15: Soldiers of the Royal Electrical and Mechanical Engineers (REME) and the Ropyal ASrmy Medical Corp administer Covid-19 booster vaccinnes at the walk in clinic at Chester Cathedral on December 15, 2021 in Manchester, England. Soldiers of the British Army have been trained by the NHS to help the country's vaccination effort, after the government announced it was accelerating its Covid-19 booster programme due to concerns about the Omicron variant. The UK aims to offer every adult a booster jab before the end of the year. (Photo by Christopher Furlong/Getty Images)
The fast spread of omicron has led many wealthy countries to speed up vaccine rollout and widen booster programs. Here, British soldiers administer shots at a vaccine clinic at Chester Cathedral in Manchester, England, on Wednesday.

If you're worried about the new omicron coronavirus variant, you're far from alone: The World Health Organization is warning that omicron is spreading like no other strain of COVID-19 has before."Omicron is spreading at a rate we have not seen with any previous variant," WHO Director-General Tedros Adhanom Ghebreyesus said at a news briefing.Omicron has been found in 77 countries less than a month after it was officially reported. As it announced that figure, the WHO added, "the reality is that omicron is probably in most countries, even if it hasn't been detected yet."Omicron's unusually high number of mutations on its protein spike quickly prompted fears that it would be more transmissible than any other variant and that it would potentially elude vaccine protections.Early data from South Africa links the variant to fewer hospitalizations, but experts warn that dynamic might not be the same for every country, saying South Africa's situation could have more to do with the very high proportion of its citizens who've previously been infected with COVID-19. And because of the high transmission rate, health officials are bracing for a wave of new patients, just the same."Even if omicron does cause less severe disease, the sheer number of cases could once again overwhelm unprepared health systems," Tedros said.The WHO chief said he's concerned that omicron's emergence could trigger "vaccine hoarding" — as wealthy nations roll out booster programs for their entire vaccine-eligible population, rather than prioritizing those most at risk."Let me be very clear: WHO is not against boosters. We're against inequity," Tedros said. He later added, "The order matters. Giving boosters to groups at low risk of severe disease or death simply endangers the lives of those at high risk who are still waiting for their primary doses."Illustrating the massive gap in vaccination status among countries worldwide, Tedros said, "41 countries have still not been able to vaccinate 10% of their populations, and 98 countries have not reached 40%."While acknowledging vaccines' primary role in fighting the coronavirus, Tedros said people must continue to wear face masks and be mindful of physical distance, hygiene and ventilation, stating that "vaccines alone will not get any country out of this crisis."South African officials raised the alarm about the heavily mutated variant, B.1.1.529, on Nov. 24. Two days later, the WHO classified it as a variant of concern and dubbed it omicron. Copyright 2021 NPR. To see more, visit https://www.npr.org.