Is There Something in the Hole That We've Missed?

Willow has been unwell for the last 12 to 18 months. Doctors are trying to work out what is wrong with her and why she's ill. They think it could be down to a lack of exposure to good bacteria in recent years. But they also wonder if there really have been no infections this summer. So, we head to the front line at Whatford General Hospital where Willow was treated.