Greece reimposes Covid curbs after Christmas easing; just under 3 million Americans vaccinated so far as US death toll continues to rise; Israel vaccinates more than a million people
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Another 314 people have died from coronavirus in Brazil, amid another 15,827 positive cases being recorded in the last 24 hours.
According to its health ministry, the country has registered more than 7.7m cases of the virus since the pandemic began. The official death toll has risen to 195,725.
Teaching unions in Wales have also called for the reopening of schools to be delayed.
NASUWT and the headteachers body NAHT Cymru said concerns over increased transmissibility of the new Covid-19 variant, and its risk to teachers, meant schools should move to home learning.