Broadcast on 1 May, we ran a third live Q&A session with two of our infectious disease modelling experts, Professor John Edmunds and Dr Petra Klepac of LSHTM. John and Petra answer on a range of topics proposed by the audience including how modelling provides evidence to COVID-19 policy, modelling the lockdown exit in the UK, ideal data sets and limitations of modelling an outbreak. To watch the livestream go to: https://twitter.com/LSHTM/status/1256181729171329024?s=20