Parents and guardians can now book a COVID-19 vaccine appointment for their children using a new online system.
The HSE is expanding access to centres for the 5-11 age group, giving parents an option to bring their child for the vaccine at a time that suits them.
This is a change from the previous system, where parents would register their child and then receive an appointment time & date from the HSE.
Appointments can now be booked up to five days in advance.
The change comes amid low uptake of the vaccine among younger age groups so far.
Figures from the HSE show just under one in four under-12s have been registered for a vaccine so far.
Only 12.5% of five to 11-year-olds are double vaccinated, with 22.6% having been given a single dose.
Hugh Kane, operations manager of the vaccination program for Ireland East Hospital Group, says midterm is a good opportunity to get children vaccinated.
He said: "We're taking advantage this week, where children are off school and there's opportunities to get a vaccine at a time & place that suits you.
"It means when children get back to school they have a higher level of protection."
Mr Kane said health officials are now looking to increase the level of vaccination in younger children, in order to give an extra level of protection to them and people around them.
Children aged 5-11 receive a lower dose of the Pfizer COVID-19 vaccine than adults or teenagers.
Children cannot yet get vaccinated at walk-in clinics or pharmacies, meaning parents have to register in advance.