DUP leader Sir Jeffrey Donaldson has tested positive for Covid-19.
Sir Jeffrey tweeted today that he had received a positive result from a PCR test.
"When I returned from London on Friday evening I felt a cold coming on but it has been getting worse," he said.
"PCR test has now come back positive. Close contacts will be notified. Thankfully I received my booster two weeks ago. The importance of being vaccinated cannot be overstated."
He added: "Work still goes on even though I'm a bit croaky. Sore throat is most uncomfortable symptom. I will still be having a virtual meeting with the Foreign Secretary @trussliz this afternoon on the need to remove the Irish Sea border which is reducing accessibility to medicines etc."
Sir Jeffrey revealed the news after Health Minister Robin Swann has said the best gift that can be given this Christmas is getting the Covid-19 vaccination.
He was speaking during a visit to the Titanic Exhibition Centre in Belfast today, the first day of its operation as a new mass vaccination site.
"This morning we have seen over 500 walk-ins coming forward to receive their vaccines, so we're already off to a flying start," he said.
"And again to encourage anyone who still has to come forward to get their vaccine to do so, we have a number of facilities across Northern Ireland, here, trusts, GPs, community pharmacy, so the options are there.
"I think the best gift that anybody can give themselves this Christmas is coming forward and getting their vaccine."
