Long Covid may be causing "ghosts" of the virus to linger within the body, according to Professor Luke O'Neil.
Professor O'Neill, who is a Professor of Biochemistry at Trinity College, was speaking from a conference in Philadelphia to Newstalk's Pat Kenny, explaining how a new study found remnants of the virus in the digestive tract of long Covid patients.
He said: "I'd say half the speakers at the conference here in Philadelphia are talking about long Covid because that remains a big concern, as you know, and the incidence of that are quite high, especially in the US because if you're unvaccinated, you've a higher risk of long Covid as well.