The European health agencies have said there's ‘no clear evidence’ on second boosters for under 60s.
People aged over 60, and those with an underlying condition, look set to be offered a second Covid-19 booster vaccine.
The European Centre for Disease Prevention and Control (ECDC) and the European Medicines Agency (EMA) are recommending that second booster doses of mRNA Covid-19 vaccines be considered for people between 60 and 79 years old and people with medical conditions putting them at high risk of severe disease.
These could be administered at least four months after the previous one, with a focus on people who have received a previous booster more than 6 months ago.
However, at the moment, there is no clear evidence to support giving a second booster dose to people below 60 years of age who are not at higher risk of severe disease.
There's also no clear evidence to support giving early second boosters to healthcare workers or those working in long-term care homes unless they are at high risk.

Former Swimming Coach George Gibney Jailed For Over 15 Years For Sexual Abuse Of Children
Robert Pether Returning To Ireland After Five-Year Iraqi Detention
Over 23,000 Teachers Beginning Industrial Action Today
New Funding Announced For Youth Services And Counselling In Kildare On World Mental Health Day
Jury In Triple Murder Trial Of Louth Family Sent Home
Appointment Cancellations Expected As Strikes To Take Place Next Week
Families Face Delays Arranging Funerals Amid Pressure On Post-Mortem Services
Media Minister Says Meeting With RTÉ Was "Positive" Amid €20M Funding Cut