Omicron spreads faster and weakens jabs: WHO The Omicron coronavirus variant is more transmissible than the Delta strain and reduces vaccine efficacy but causes less severe symptoms according to early data, the World Health Organisation said Sunday( Dec 12). The Delta variant, first identified in India earlier this year, is responsible for most of the world's coronavirus infections. But South Africa's discovery of Omicron-which has a large number of mutations-last month prompted countries around
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2021-12-13 00:00:00.0