The UCD walk-in vaccination centre is not taking any more walk-ins.
The vaccine centres in Citywest, the National Show Centre in Cloghran and Shoreline in Greystones are still taking people.
Most booster sites are experiencing delays of up to one hour today across the country.
UCD was the first to announce it wasn't taking any more to be vaccinated.
Earlier this morning - the HSE said there were queues of over 2 and a half hours at the college.
UPDATE - current queueing times:
📍 UCD is at full capacity and will not be taking any more walk-ins.
Citywest, National Show Centre and Shoreline are open today. Details of alternative times and locations here: https://t.co/2ew0ZKomar— HSE Ireland (@HSELive) December 11, 2021
In a tweet this morning - HSE chief Paul Reid has urged those to take the booster jab.
He says it'll help make the situation in Irish hospitals better.
The comment comes in spite of figures showing a decline in those being treated for Covid-19.
The latest numbers show that 481 patients are being treated in hospital for the virus.
That number is down from a peak of 685 last month.