Exactly two years after the World Health Organization issued an alert about "a cluster of cases of pneumonia of unknown cause" in the central Chinese city of Wuhan that evolved into the global COVID-19 pandemic, the world is now struggling under the weight of the fast-moving omicron variant of the coronavirus that sparked the disease.
In Brazil, a surge of new COVID-19 cases driven by the omicron variant has prompted authorities in Rio de Janeiro to cancel its iconic Carnival street festival for the second consecutive year. <
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