The World Health Organisation warned wealthy countries on Thursday (Dec 9) against hoarding Covid-19 vaccines for booster shots as they try to fight off the new Omicron variant, threatening supplies to poorer countries where inoculation rates are low.

WHO Director-General Tedros Adhanom Ghebreyesus said the world was not on track to meet vaccination targets and that Omicron illustrated the "perilous situation" the world was in.

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