It's a virus we never thought about much pre-Covid, but during the first winter with no restrictions in place, RSV has exploded in Ireland. But what is it, who is most at risk, and how do we protect ourselves against it? Joining us this week is Dr Niamh Lynch, a consultant paediatrician in Cork, to explain more. We also speak to Paul Murphy, whose son Liam was recently critically ill with RSV.The Explainer is brought to you by The Journal. Providing open access to valuable journalism in Ireland has been the aim of The Journal for a decade. You can contribute to ensure we can keep questioning, investigating, debunking, explaining and informing at www.thejournal.ie/contribute/