People from countries with incidence rates below 500 may travel there.
Portugal has announced it will admit tourists from most European countries from Monday.
The decision comes after months of restrictions to prevent the spread of Covid-19 in the country.
Travellers from EU countries with virus rates below 500 cases per 100,000 population can visit Portugal, including for non-essential visits.
On Thursday, Ireland's 14-day incidence rate stood at 129.3 per 100,000 people.
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