18 to 34 year olds will be able to get vaccinated in pharmacies from Monday.
The official advice from NIAC is under 50's should get an mRNA vaccine such as Pfizer where possible.
However 18 to 34 year olds who want an earlier vaccination will be able to get the one-shot Johnson and Johnson in a local pharmacy.
It comes as the Deputy Chief Medical Officer says at least 80 per cent of the population will need to be vaccinated before the country can fully reopen.
Dr Ronan Glynn says the news doesn't change it's recommendation to delay indoor dining.