The Taoiseach and Tánaiste are both clear of Covid-19 -- having taken rapid tests as a precaution after the Green Party leader came down with the virus.
Climate Action Minister Eamon Ryan won't be travelling to Glasgow after testing positive for covid 19.
Minister Ryan says he was not experiencing any symptoms when he went for a routine test on Friday.
All delegates to the Cop26 climate summit were asked to do a PCR swab before setting off for Glasgow.
But when his result came back yesterday, it was positive for Covid-19.
His swab was taken just a day after he attended a full in-person meeting of the Cabinet -- along with a press conference at government buildings.
A government spokesman says nobody at the cabinet was deemed to be a close contact by the HSE, and were not required to self-isolate.
However, the Taoiseach, the Tánaiste and another senior official who was at the press conference did take antigen tests yesterday evening "out of an abundance of caution".
It was confirmed last night that those tests have all come out clear.
Minister Ryan was due to attend the summit as leader of the Irish delegation -- but will remain in self-isolation at home.
In a statement he says the Irish contingent will "continue its efforts to secure meaningful progress" at the summit.