WHO Omicron alert: rate of spread, vaccine efficacy

A World Health Organization panel has labeled the new Omicron coronavirus as a highly transmissible "variant of concern," the same category as the fast-spreading Delta variant. First detected in South Africa, the variant is very new, and global researchers are looking into how harmful it is. As Omicron popped up in Europe, North America, Latin America, and some countries in Asia, flights to and from Southern Africa have been suspended. Global vaccine makers have announced efforts to upgrade vaccines against Omicron, with China's CanSino announcing it has begun data collection and analysis of the variant. As Omicron rapidly spreads, it is a dire reminder of the fact: "None of us are safe until all of us are safe." What more can be done to curb Omicron's spread?

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