This episode is all about communicating about risks and statistics during Covid. When you’re talking to patients – in the consulting room, on the phone, or perhaps even on the radio or TV - how do you explain the sensitivity and specificity of a test, confidence intervals, or the benefits and risks of taking the Covid vaccine? Should we use analogies, and what about relative versus absolute risk? Statistician Sir David Spiegelhalter,  Winton Professor of the Public Understanding of Risk at the University of Cambridge, who has been appearing regularly in the media and advising the government throughout the pandemic, offers some practical tips.