The HSE will give an update on when people can get a Covid-19 vaccine over the coming months when it goes before the Oireachtas Health Committee later.
It's believed people aged 59 are due to receive a first dose of a vaccine in early May.
The plan is expected to exclude Johnson and Johnson's vaccine - which has been put on hold due to concerns of blood clotting events in the US.
The National Immunisation Advisory Committee will also attend the hearing.
