WHO flags Omicron severity warning

World Health Organization (WHO) chief scientist Soumya Swaminthan has said it would be “unwise” to conclude from early evidence that the Omicron variant is a milder variant than previous ones.

The Omicron variant also is spreading faster than the Delta variant and is causing infections in people already vaccinated or who have recovered from the COVID-19 disease, according to the WHO.

“… with the numbers going up, all health systems are going to be under strain,” Soumya Swaminathan told journalists.

The variant is successfully evading some immune responses, she said, meaning that the booster programmes being rolled out in many countries ought to be targeted towards people with weaker immune systems.

“There is now consistent evidence that Omicron is spreading significantly faster than the Delta variant,” WHO director-general Tedros Adhanom Ghebreyesus (above pic) told the briefing.

“And it is more likely people vaccinated or recovered from COVID-19 could be infected or re-infected,” Tedros said.

Their comments echoed the finding of study by Imperial College London, which said last week the risk of reinfection was more than five times higher and has shown no sign of being milder than Delta.

WHO officials said however that other forms of immunity vaccinations may prevent infection and disease.

While the antibody defences from some actions have been undermined, there has been hope that T-cells, the second pillar of an immune response, can prevent severe disease by attacking infected human cells.

WHO expert Abdi Mahamud added: “Although we are seeing a reduction in the neutralisation antibodies, almost all preliminary analysis shows T-cell mediated immunity remains intact, that is what we really require.”

In the short term, Tedros said that holiday festivities would in many places lead to “increased cases, overwhelmed health systems and more deaths” and urged people to postpone gatherings.

“An event cancelled is better than a life cancelled,” he said.

But the WHO team also pointed towards the development of second and third generation vaccines, and the further development of antimicrobial treatments and other innovations.

“(We) hope to consign this disease to a relatively mild disease that is easily prevented, that is easily treated,” Mike Ryan, the WHO’s top emergency expert, told the briefing.

“If we can keep virus transmission to minimum, then we can bring the pandemic to an end.”

However Tedros also said China, where the SARS-CoV-2 coronavirus was first detected at the end of 2019, must be forthcoming with data and information related to its origin to help the response going forward.

“We need to continue until we know the origins, we need to push harder because we should learn from what happened this time in order to (do) better in the future,” Tedros said.

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