For more information, please visit https://www.dfa.ie/irish-embassy/usa/news-and-events/covid19-updates/
For those that plan to drive during their trip, car rentals are available at Dublin airport. You can also take the train cross country from Dublin to Cork City. Less than three hour journey, hop on the train at Dublin Houston train station and stop at Corcaigh Kent/Cork (Kent). Purchase train tickets at https://www.irishrail.ie/en-ie/Station/dublin-heuston
Download the VeriFly app so customs can scan your vaccination/negative test documents quickly.