There were more than 1,000 new outbreaks of COVID-19 in Ireland last week.
The vast majority of the 1,057 the new clusters were in private homes, the latest data from the HPSC shows.
A cluster or outbreak is recorded when there are two or more linked cases of COVID-19 in a particular setting.
The 954 outbreaks in private houses last week was more than double the 443 reported the previous week.
The figures show 10 outbreaks were associated with schools last week, down from 24 the previous week.
20 of last week's outbreaks were in workplaces - four of which were in the construction sector and three in meat processing plants.
Nine of the outbreaks were in hospitals, while seven were in residential institutions
12 related to extended families, while 15 were classed as community outbreaks.
Among vulnerable populations, there was one outbreak among the Roma community, two in direct provision centres, and four among the Irish Traveller community.