The Chief Medical Officer says there's not enough "real-world evidence" to support the use of antigen testing for international travel.
Dr Tony Holohan is currently before the Oireachtas Transport Committee answering questions about NPHET's position on antigen testing.
It's after the Committee heard evidence last week that antigen testing was more efficient than PCR testing for traveling abroad.
Passengers arriving into Ireland currently need a negative PCR test taken no more than 72 hours before arrival. Dr Holohan says they will continue to review emerging evidence.