54 new cases of Covid-19 were announced yesterday for Donegal and Sligo, with 31 in Donegal and 23 in Sligo.
There were fewer than five in Leitrim.
40 new cases were announced yesterday for Cavan.
It's as the Chief Medical Officer Dr Tony Holohan says too many people are not self-isolating after testing positive for Covid-19.
In the last 14 days, there have been 737 new cases in Cavan, 525 in Donegal, 290 in Sligo and 70 in Leitrim.
According to a NEPHET update yesterday with data relevant until midnight on Saturday, there were 1,935 cases in Donegal, 559 in Sligo and 226 in Leitrim.
Professor Anthony Staines of DCU says each county has specific outbreaks:
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