26,000 Johnson and Johnson vaccines are due to arrive here later this week, according to the HSE.
It comes as pharmacies have almost run out of these Covid jabs, after the rollout was extended to under-35s earlier this month.
They've administered nearly 150,000 so far - with 50,000 in the past week alone.
But Darragh O'Loughlin, from the Irish Pharmacy Union, says the shortage of supply is very concerning.
"We have a fantastic amount of people now who are used to being able to get a vaccine in their local pharmacy or a local pharmacy.
"What we don't want is to go for a couple of weeks without supplies into pharmacies, the vaccination services would obviously have to be suspended if we didn't have vaccines.
"Then when vaccines would become available again we're trying to restart that enthusiasm that's already there."
