Parts of Co Derry have seen the number of recorded positive cases halve in the last week, figures show.
According to the latest data from the Department of Health, BT48 and BT47 collectively had 1,446 in the last seven days ending January 17 - that's 1,994 fewer positive tests than the previous seven days.
So, this means Derry's week-on-week percentage change figure dropped by around 80%.
In BT48 positive cases fell from 1,918 to 681 in the last week - a reduction of 1,237.
Cases in BT47, which includes parts of the Waterside and Co Derry, fell from 1,522 to 765 - a more than 50% reduction.
It comes as Northern Ireland recorded four more Covid related deaths in the past 24 hours.
According to the Department of Health, a further 3,295 new positive cases have been recorded in the same time frame.
A total of 23,630 new cases have been recorded in the past seven days.
There are currently 395 inpatients in hospital infected with the virus, with 28 of these in intensive care.
SDLP Councillor Brian Tierney, who told MyDerry last week that the situation was "extremely worrying", praised the public for their efforts over the last seven days.
He said: "It's good that the numbers in the city and the wider Derry area are starting to come down now and that shows that the public is clearly listening to the public health message.
"The medical experts have put the advice in place for people to follow and last week the numbers were worrying and to see a drastic decline in the last week is welcome news."
However, the Ballyarnett elected rep urged residents to "keep up their guard" and not become "complacent" against the virus.
"I would encourage those who haven't already to go and get their vaccine because that's clearly helping reduce the number of positive cases that we have in the community.
"It has been proven time and time again that we cannot become complacent against this virus because it only takes two or three days of not following the advice for a surge to appear again.
"This is about everybody staying vigilant so that we can get back to normal as soon as possible."
