Coronavirus: more Omicron variant cases pop up as world rushes to learn more

Cases of the Omicron variant of the coronavirus popped up in countries on opposite sides of the world on Sunday and many governments rushed to close their borders even as scientists cautioned that it is not clear if the new variant is more dangerous than other versions of the virus.The variant was identified days ago by researchers in South Africa, and much is still not known about it, including whether it is more contagious, more likely to cause serious illness or more able to evade the…


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