For the first few months of our lives we are quite literally, fearless.
In this programme, Drs Chris and Xand van Tulleken discover the everyday miracles that keep you alive. They explore the extraordinary lengths our bodies go to in order to keep our organs working at every moment of every day. They see how powerful reflexes keep us safe from danger and uncover the amazing mechanisms our bodies call on to repair damage. And for the first time ever, they see exactly how our immune system's killer cells go into battle against deadly infection.