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The agency classified omicron as a variant of concern on November 26, shortly after it was first discovered, and much remains unknown about it, including the severity of the disease it causes.
“There are still limited data on the clinical severity of omicrons,” the WHO said. “More data is needed to understand the risk profile and how risk is affected by vaccination and pre-existing immunity.”
“There are still limited data, and no peer-reviewed evidence, about the efficacy or efficacy of the vaccine to date for Omicron,” she added.
The World Health Organization has warned that with cases rising so quickly, hospitals could be overwhelmed in some places.
“Hospitals in the UK and South Africa continue to rise, and given the rapidly increasing number of cases, it is possible that many healthcare systems will quickly become overwhelmed.”
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