The HSE's confirmed it’s been told that the age limit for two vaccines can be lowered.
NIAC has recommended the AstraZeneca and Johnson and Johnson jabs can be used in people in their 40s.
Health officials are expected to announce an updated decision on the rollout in the coming days.
The HSE’s Chief Clinical Officer, Colm Henry, says they’re considering the advice carefully:
"Some information over the weekend indicating the line of thinking by NIAC, as it was relayed by the CMO to the Minister of Health; and that certainly shows that NIAC certainly considered the administration of these vector vaccines, you know the AstraZeneca and the Johnson and Johnson, to 40-49 year olds with some conditions attached and we have to go through those."