Dr. Chris van Tulleken is an infectious diseases doctor at UCLH, and one of the BBC’s leading science presenters having worked on many flagship Health & Science programmes. In 2019, Chris alongside his twin brother Xand, put competing health theories to the test with the help of 30 other pairs of identical twins in 'Twinsitute' for BBC Two. The pair also hosted 'Planet Child' a ‘landmark perspective on global childhood development' for ITV. ‘Operation Ouch,’ Chris and Xand’s double BAFTA & Broadcast award winning series for CBBC, continues to delight audiences around the world.