Covid-19 rates in Roscommon, Sligo and Galway are currently among the lowest in the country.
Both the 7-day and 14-day rates of the virus in all three counties are below the national average, according to the latest data from the Health Protection Surveillance Centre.
It shows that, over the past week, there have been 87 new cases of the virus in Roscommon, 88 in Sligo and 343 in Galway.
The 7-day incidence rates in the three counties are around 134 cases per 100,000 people - while the national average is 199 cases per 100,000.
However, the 7-day rate in Mayo is above average at 234 per 100,000 people.
Co Mayo has recorded 306 new cases of the virus over the past week.