The Health Service Executive has said some regions will run additional walk-in vaccine clinics this weekend.
It said it is part of a national drive to encourage uptake of the vaccine as Covid numbers rise across the country.
Over the bank holiday weekend, vaccines will be available at walk-in clinics or by registering online or by telephone for an appointment.
Government and health officials have been encouraging the approximately 370,000 people who are not vaccinated, or are not fully vaccinated, to get the jab.
Appointments are not needed for the walk-in clinics, which are open to adults and children over the age of 12.
The HSE said the Pfizer/BioNtech vaccine, dose one and two only, will be available at the clinics.
University Hospital Limerick said it will run extra clinics across the mid-west region as part of the reminder campaign this weekend.
They are being held in the Mid-West Covid-19 Vaccination Centres in Ennis on Thursday and Sunday; Limerick Racecourse on Friday, Sunday and Bank Holiday Monday; and The Abbey Court Hotel in Nenagh on Friday and Saturday.
Consultant in Infectious Diseases and Group Clinical Lead for Covid-19 for the region Dr Sarah O'Connell said because of the higher risk of hospitalisation for unvaccinated people that they should attend a walk-in clinic this weekend.
"Recently we have seen very high rates of community transmission and an increased number of hospitalisations. This has put a further strain on our healthcare system, and it continues to do so unfortunately.
"Walk-in clinics are a great way to get your vaccine if you're unvaccinated, as no appointment is necessary. Before Winter comes, now is the time to protect yourself, your family and friends as much as possible against Covid-19," Dr O'Connell said.
Additional clinics will also run on Saturday, Sunday and Monday in Kilbride Community Hall in Rathmore, Co Roscommon, Breaffy House Resort in Mayo, Letterkenny Community Assessment Hub on the Kilmacrennan Road, and on Bank Holiday Monday at Sligo Racecourse Vaccination Centre.
A full list of walk-in vaccination clinics can be found here.
The HSE said anyone attending a clinic or appointment should bring photo identification.