An immunology expert says some of the criticism of Ireland's vaccine rollout has been 'unfair'.
New figures show 133,000 vaccine doses were given out in the last week of March, up from 86,000 during the same period in February.
Experts say this is still relatively small overall.
However, Trinity College immunology professor Kingston Mills says the rollout has been held back by a lack of supply.
He said: "I do think the criticism is a bit unfair, of the fact that it's slow - I think it's slow, but a lot of that is out of the hands of the Irish authorities.
“It is frustratingly small compared to what the UK is doing, but it’s all down to supply. I think we’re doing as well, if not better, than a lot of European countries.
“All the constraints are around vaccine supply. We would have immunised a lot more people if we had a lot more vaccine, but we don’t.
"With the amount of vaccine we’ve had available, Ireland has got it into people pretty quickly.”
Just under 1.2 million vaccine doses were delivered to Ireland to the end of March, with the millionth dose administered this week.
Health minister Stephen Donnelly has said he expects 250,000 doses will be administered every week by the end of this month.
