Hello Diego and welcome to our Community!
I'm glad to hear that you're going to visit Ireland soon!
If you're fully vaccinated, you won't need to present a PCR test in order to access the Republic of Ireland, although you'll need to fill in the Passenger Locator Form. You can find more information about travel restrictions in t
his article of our website.As for Northern Ireland, if you have been fully vaccinates you must complete a UK Passenger Locator Form on arrival or in the 48 hours before arrival in Northern Ireland. In addition to that, before travelling, you need to book and pay for a day two PCR test to be taken on or before day two following your arrival in Northern Ireland. You can take a look at this page to know more about current regulations for passenger
traveling from non-red list countries.¡Espero que esta información os sirva de ayuda!
Valentina