From today people aged 58 years are being invited by the HSE to register for a Covid-19 vaccination.
Meanwhile, the Department of Health is still considering a revised national vaccination plan submitted by the HSE.
The issue was raised briefly at Cabinet yesterday but it's understood no decision has yet been taken on the proposals.
The new recommendations from the HSE on how to proceed with the national vaccination programme were submitted to the Department of Health on Monday evening.
The plan advises that vaccinations continue to be age-based, with older people vaccinated before younger people.
Elsewhere, Ireland has agreed to order around 10 million extra doses of the Pfizer vaccine for 2022 and 2023.
The extra vaccines are expected to be used as booster shots through those years.