HSE calls for eligible people to come forward.
The HSE says up to half a million people who are re eligible for a booster vaccine have yet to come forward.
More than 2.6 million doses have so far been administered, with around 25,000 given out in the week up to Thursday.
A number of walk-in clinics are open this weekend, while people can also book an appointment or visit a pharmacy or GP.
Head of the HSE's Vaccination Programme, Damien McCallion, says it's important people come forward for their booster:

Man Charged After €2 Million Cannabis Seizure in Clare
Thousands Step Out at Dawn in Support of Mental Health
Two Men Appear In Court Facing Charges Including Money Laundering And Possession Of Drugs
Irish Citizens On Virus-Stricken Ship "Safe And Well", As Protests Break Out In Tenerife
1 In 4 Women Affected By Maternal Mental Health Difficulties
"Like A Bull In A China Shop": Kildare TD Criticises Media Minister Amid Proposed Social Media Ban For Under 16s
Darkness Into Light Events Taking Place Across Kildare
EPA Says Increase In Recycling Needed For Ireland To Reach 2030 Target