With effect from Thursday 6 January 2022, passengers to Ireland with an accepted proof of vaccination or proof of recovery from COVID-19 in the prior 6 months do not have to show an additional pre-departure COVID-19 test result.
Passengers without proof of vaccination, or proof of recovery from COVID-19 in the prior 6 months, must show evidence of a negative ('not detected') RT-PCR test result taken within 72 hours prior to arriving in Ireland.
From 6 January, only RT-PCR test results are accepted for passengers to Ireland.
In situations where a person is unable to present evidence of a negative ('not detected') RT-PCR test prior to travel due to continuing to test persistently positive after infection - a positive RT-PCR result from a test taken 11 or more days prior to the date on which the person arrives in the State and no more than 180 days prior to the date on which the person arrives, will be accepted.
It is an offence to travel to Ireland from overseas without a pre-departure test result unless exempt. A passenger who travels without a test result or an exemption is required to take a RT-PCR test within 72 hours following arrival.
Any individual that develops COVID-19 symptoms while in Ireland should follow the HSE guidance in relation to isolation and undertaking antigen or RT-PCR testing as appropriate.
Full Details here