Nigeria confirmed its first cases of the new Omicron COVID variant as countries tightened restrictions on international travel in an attempt to slow its spread.The Nigeria Centre for Disease Control (NCDC) said two cases of the new variant were detected among two travellers who arrived from South Africa last week.The announcement came as Ugur Sahin, the CEO of COVID vaccine-maker BioNTech, said that while the Omicron variant could lead to more vaccinated people becoming infected, they would likely remain protected against severe illness.
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