Healthcare workers and people aged 60-69 will be able to get their Covid-19 booster jabs in walk-in vaccination clinics from Thursday.
Anyone in these groups, who has completed their primary course of the Covid-19 vaccine, can attend one of the walk-in clinics for a booster without an appointment.
Those looking to get a booster jab must bring photo ID and have completed their primary vaccine dose five months ago.
"We encourage everyone to avail of your booster dose, as it gives you the best protection from serious illness caused by Covid-19," the HSE said in a statement.
All those aged over 30 will be offered a single dose of an mRNA vaccine, Pfizer BioNTech or Moderna. According to the HSE, those aged 29 or younger will be offered a single dose of Pfizer BioNTech.
The HSE has said that GPs are continuing to offer booster doses to people aged 70 and over, with people aged 50-59 and those with high-risk health conditions scheduled to receive their booster next.
Although walk-in clinics are opening, scheduled appointments are still continuing for the current age groups who can get a booster.
"People will receive a text message to attend the appointments for their booster dose, and we encourage everyone to attend these scheduled appointments, or to use the instructions in the text to change them," the HSE said.
This comes as concerns have been raised over the number of people not showing up for their booster jab.
Last week at a briefing, health officials said they were seeing 50 per cent no-show rates in some areas.
Meanwhile, around 1,500 people a day are getting vaccinated according to HSE figures, but there are concerns that eligible people are not coming forward fast enough for booster jabs.
Anyone looking to avail of a booster jab can check out the walk-in clinic opening times and locations here.