The HSE is currently offering additional doses of the vaccine to those over 80.
A midlands immunologist says booster vaccines should be considered for people who got an AstraZeneca or Johnson and Johnson vaccine.
The European Medicines Agency yesterday cleared the way for countries to administer an extra dose to healthy adults.
The advice will now be examined by regulators here, while the HSE administers extra doses to a small cohort of the population including over 80s.
Immunology professor at Trinity College, Mullingar's Kingston Mills says it's unlikely that mass vaccination centres will be needed any time soon: