Brendan Griffin (Kerry South, Fine Gael) | Oireachtas source

Have there been cases where people have tested negative here, gone abroad to a reputable or non-reputable clinic and obtained a positive diagnosis, returned here, been retested and found positive? In cases where people have obtained positive results abroad, what happens when they return? What happens if someone goes to mainland Europe after receiving a negative diagnosis here, gets a positive diagnosis there, returns and further tests show something else?