Estimates from the Office for National Statistics suggest between 8% of people in Northern Ireland and 12% of people in England showed signs of recent Covid infection.
In October, antibody positivity ranged from 2% to 7% around the UK.
And 6,586 Covid deaths were registered in UK in the week to 8 January .
That brings the total registered so far close to 96,000.
Yorkshire and the Humber led the chart with 17% of people having positive antibodies.