Ireland has been put under similar lockdown measures to the UK following three more coronavirus-related deaths.
Taoiseach Leo Varadkar said residents should stay home until at least 12 April unless they are buying groceries, attending medical appointments or collecting medication, getting brief exercise or making essential family visits.
Almost all shops will be told to close and all gatherings outside of families will be banned.
Public transport will be available only to essential workers and nobody should travel beyond 2km (1.2 miles) from their homes for any reason, he added.
Those over the age of 70 or with chronic diseases will be told to stay in their homes without exception over the period, which begins at midnight.