The DoH dashboard reported 351 new infections on Tuesday December 8 but on Tuesday December 15 the number of new infections jumped to 486 - this represents an increase of 135 (38.4%).
The latest data on the Covid-19 dashboard also shows that the number of infections reported on Tuesday was 67 more than what had been reported on Monday - this equates to a 16% increase.
The total number of people to test positive for Covid-19 since the beginning of the pandemic now stands at 59,121.
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The Covid-19 dashboard also confirmed six additional Covid-19 related deaths had been recorded in Northern Ireland in the last 24 hours.
It takes the total number of Covid-19 related deaths in Northern Ireland to 1,135.