What can the world learn from countries where Omicron is surging?
CNN
South Africa, the United Kingdom and Denmark are three of the countries where the Omicron variant is now surging, less than a month after it was first detected.
The UK is seeking to vaccinate itself out of the crisis, with an accelerated campaign to give a third Covid-19 vaccine dose to all eligible adults by the end of December.
In South Africa, meanwhile, researchers say early data suggests Omicron causes milder symptoms -- but it's still unclear how much of a role immunity from vaccination or previous infection plays.
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