At least 80 per cent of all other age categories have signed up for a vaccine.
Nearly one in every three 12 to 15 year olds still aren't registered for a Covid vaccine.
The HSE says 71 per cent are signed up - and 65 per cent are fully vaccinated.
Registration for this age-group opened nearly three months ago.
At least 80 per cent of all other age categories have signed up for a vaccine.