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Omicron cases doubling at least every 3 days, WHO says

The Omicron variant of the coronavirus is spreading significantly faster than the Delta strain in countries with documented community transmission, with the number of cases doubling in 1.5 to 3 days, the World Health Organization (WHO) has said.

In an update on Saturday, the United Nations’ health agency said Omicron has been reported in 89 countries.

The highly mutated variant is spreading rapidly in countries with high levels of population immunity, the WHO said, but it is unclear if this is due to the virus’ ability to evade immunity, its inherent increased transmissibility or a combination of both.

The agency designated Omicron a variant of concern on November 26, soon after it was first detected by scientists in South Africa, and much is still not known about it. Scientists remain uncertain how dangerous it is, but early data suggests it can be more resistant to vaccines and more transmissible than the Delta variant.

“There are still limited data on the clinical severity of Omicron,” the WHO said in its update. “More data are needed to understand the severity profile and how severity is impacted by vaccination and pre-existing immunity.”

It added, “There are still limited available data, and no peer-reviewed evidence, on vaccine efficacy or effectiveness to date for Omicron.”

On Friday, a non-peer reviewed study by Imperial College London said the risk of reinfection with Omicron is more than five times higher and it has shown no sign of being milder than Delta.

The research cast doubt on the cautious optimism of some experts, based primarily on anecdotal accounts from South Africa, that the new strain may not be as virulent and not overwhelm healthcare systems.

The study was released as British officials reported record COVID-19 cases for the third consecutive day, with a rise to 93,045 new infections, while French Prime Minister Jean Castex likened Omicron’s spread in Europe to “lightning”.

On Thursday, United States President Joe Biden warned of a “winter of severe illness and death” for those unvaccinated against COVID-19, while health ministers at the G7 bloc of advanced economies called Omicron the biggest threat to global public health.

It came after WHO chief Tedros Adhanom Ghebreyesus said Omicron “is spreading at a rate we have not seen with any previous variant” and lamented that some people were dismissing it as a mild variant.

“Surely, we have learned by now that we underestimate this virus at our peril,” he told a media briefing on Tuesday. “Even if Omicron does cause less severe disease, the sheer number of cases could once again overwhelm unprepared health systems.”

Source: Al Jazeera/ Agencies

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Chandana Sesath Jayakody

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