80 per cent of 16 and 17 year olds have registered, leaving 26,000 unregistered.
Nearly one in every three 12 to 15 year olds haven't been registered for a Covid vaccine.
That's 85,000 children.
New figures show 69 per cent of this age-group are signed up.
It's much lower than all other age categories - which range from 80 per cent to 99 per cent.
Dr Lucy Jessop, from the HSE's national immunisation office, is re-assuring parents the vaccines are safe for their children
80 per cent of 16 and 17 year olds have registered, leaving 26,000 unregistered.
Dr Jessop says the take-up among pregnant women is also less than the national average
.