So what is the science behind the delta variant?
Christine Loscher, Professor of Immunology at DCU joined Kieran on the Hard Shoulder to explain.
The Hard Shoulder
Listen and subscribe to The Hard Shoulder on Apple Podcasts, Google Podcasts and Spotify.
Download, listen and subscribe on the Newstalk App.
You can also listen to Newstalk live on newstalk.com or on Alexa, by adding the Newstalk skill and asking: 'Alexa, play Newstalk'.
