The European Medicines Agency said it has confidence in the safety and efficacy of mRNA Covid-19 vaccines for use among those aged 12 to 15.
EMA Executive Director Emer Cooke said the "impressive" performance of both the Moderna and Pfizer vaccines in older populations, at over 90%, has been replicated in children's trials.
Speaking on RTÉ's News at One, she said in authorising the vaccines for use in these younger cohorts it reviewed the trial results among "a very robust database" of 4,000 children.
The EMA is also monitoring "very carefully the experience" in both the United States and Israel, where they have vaccinated these age groups.