There are fears the new Covid-19 variant could be more resistant to current vaccines.
The closure was imposed after the country reported its first case of coronavirus.
Five steps Nigerian start-up Paystack took to build and strike a $200m deal with Stripe.
The government said suspected jihadists ambushed the two villages near Niger's border with Mali.
Photographer Hugh Kinsella Cunningham goes out with UN peacekeepers.
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