The United States is set to drop its requirement for all airplane passengers to provide a negative Covid-19 test before departure.
The change will come into force at midnight on Sunday for all passengers arriving by plane.
The decision follows heavy lobbying from airlines and the travel industry, a senior administration official told Reuters.
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Kevin Munoz, the White House assistant press secretary, tweeted that Joe Biden's work on vaccines and treatments was "critical" to the development.
He said the Centers for Disease Control and Prevention will monitor "based on the science and in context of circulating variants" but for now deemed testing as being no longer necessary.
Paul Hackett, president of the Irish Travel Agents' Association, told RTE that the decision to drop pre-flight Covid-19 testing was "really good news".
He said: "There is huge demand from the Irish market for travel to the US. Not just for holidays, but for visits to friends and family.
"In fact, travel from Ireland to America is back up to about 90% of what it was before the pandemic."
The United States was Ireland's most important source of overseas revenue in 2019 with 1.7 million tourists travelling here.
Americans spent €1.6 billion on the island of Ireland that year, a growth of 71% since 2014.
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