It’s every parent’s worst nightmare. One moment their child is perfectly healthy. The next, they’ve stopped breathing and are turning blue. For many children, the merest hint of nut is all it takes to send them into anaphylactic shock. Food allergies are on the increase and the number of children affected has more than doubled in the past ten years. Yet simple precautions could significantly cut the death rate. This week’s documentary, When Food Kills is a wake up call to the rising danger of food allergies….