There's currently 3 days worth of stock across the main groups - around half of the usual levels.
Hospitals may have to start cancelling surgeries if there isn't an increase in people giving blood over the coming weeks.
The Irish Blood Transfusion Service says there's currently 3 days of stock - compared to the usual 7 days' worth.
It's asking donors to book appointments to give blood to help get supplies back to normal levels.
Operations director with the IBTS, Barry Doyle, hopes hospitals won't have to cancel procedures:
Barry Doyle says it's crucial people come forward
IBTS has launched an urgent appeal today to donors as supplies are very low, it's vital eligible texted donors make an appt to attend this weekās clinics to meet hospital demand. Visit https://t.co/ijLZ3m9PoT for your local clinic details, check eligibility or reg your interest𩸠pic.twitter.com/PfHgqJ6UCA
— Giveblood (@Giveblood_ie) October 26, 2021

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