Both the AstraZeneca and Johnson and Johnson vaccine are to be made available for everyone, regardless of age.
NIAC made the recommendation to government last night - the jabs had previously only been given to those over 50.
The gap between doses of AstraZeneca is also set to be cut in half - from eight to four weeks.
This would allow many more people in their 60s to be vaccinated faster.
Tony O'Brien, former director-general of the HSE, says both recommendations are really positive.
He says they'll enable us to much more rapidly increase the number of people getting access to a Covid vaccine.