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![]() ![]() ![]() Scientists are racing to determine the threat posed by the heavily mutated Omicron strain, which is more transmissible than the dominant Delta variant, and whether it can evade existing vaccines. The classification puts Omicron into the most-troubling category of COVID-19 variants, along with the globally-dominant Delta, plus its weaker rivals Alpha, Beta and Gamma. The World Health Organization on November 26 declared the recently-discovered B.1.1.529 strain of COVID-19, first detected in southern Africa, to be a variant of concern and renamed it Omicron.
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