Pharmacies that are low on stock of the Johnson and Johnson Covid-19 vaccine won't get fresh supplies until the middle of next week.
The Irish Pharmacy Union says its members have received an overwhelming level of interest from people aged 18 to 34 who want to get the jab.
However it says many people could be left disappointed as there have been 10 calls for every vaccine that's currently available.
Darragh O'Loughlin from the IPU says only those that were already distributing the jabs to older people will have supplies from Monday morning: