Hundreds of people queued around the block for walk-ins and scheduled appointments at City Hall vaccination centre yesterday.
Booster jabs were being offered at the weekend to healthcare workers and those aged between 60 and 69, with anyone over 12 years of age also encouraged to attend for a first or second dose of the Pfizer vaccine.
For walk-ins, some people waited up to two hours for their jab.
RedFM news has requested a statement from the HSE on the lengthy queues experienced by people on Sunday.