More than half of people coming to Ireland from abroad, who should be self-quarantining for two weeks to avoid possibly passing on Covid-19, are not answering phone calls checking on their whereabouts.
igures reveal that from the end of May to the middle of June, as overseas holiday traffic increased, officials rang 684 new arrivals who had come here from abroad by plane or boat.
But just 308 of the calls were answered - 45pc, the figures obtained by the Irish Independent reveal.
The worrying pattern of many overseas arrivals here going missing has been repeated over several weeks, the Department of Justice data revealed.
The self-quarantine is strongly advised but not mandatory.
It comes as public health doctors reveal a resurgence in cases of the virus linked to foreign travel.
During June, a total 31 cases of Covid-19 in Ireland were associated with travel from abroad after months when it posed a low risk of virus spread.
Chief medical officer Dr Tony Holohan repeated the advice which has been in place since the start of the pandemic to avoid all non-essential travel abroad.
"The World Health Organisation has warned that the global pandemic is accelerating.
"In the past week, over 160,000 cases have been reported each day," he said.
Earlier this week he advised people who had booked foreign holidays to cancel them to reduce the risk of picking up the virus abroad and spreading it on their return home.
Next week, the Government is set to publish a list of countries, including Greece and Finland, which Ireland could set up air bridges with, allowing people from both countries to travel to each destination without quarantine restrictions.
The advice will still be not to travel but if people want to go overseas they should restrict themselves to these countries.
However, it is highly unlikely there will be any mechanism for a refund for people who cancel holidays because the guidance throughout has been not to book non-essential trips overseas.
Dermott Jewell of the Consumers' Association said the Government needs to offer guidance to airlines and provide a fund so that holidaymakers who choose not to travel can get their money back.
Dr Holohan yesterday announced another three people have died from the virus, brining the death toll to 1,738.
Another six cases of the virus were confirmed and numbers continue to be low despite the opening-up of businesses after the lockdown.
It brings to 25,477 the number of cases of the virus here so far.
The National Public Health Emergency Team (Nphet) will meet today to review the latest trends in the disease in advance of the list of air bridge countries being announced next week.
Meanwhile, the vast majority of adults believe that holidays to countries with high rates of Covid-19 should not be allowed, a survey has found.
Market research carried out by iReach found that nine out of 10 adults believe that holidays to countries with high rates of Covid-19 should not be permitted. The US has seen a huge number of virus cases and deaths.
The survey found those aged 55-plus feel even stronger on this, with 96pc of this age group believing holidays to these countries should not be permitted.
The research was carried out between June 25 and 30.
Some 60pc would still not travel abroad to countries we have air bridges with.