The Queen, in her role as patron of Medical Detection Dogs (MDD), hosted a reception with some of the dogs, charity workers and researchers to celebrate the charity at Clarence House, London.MDD trains lifesaving medical alert assistance dogs and bio detection dogs, both of which can be trained to detect even the tiniest trace of the smell caused by a medical condition.

The Queen, in her role as patron of Medical Detection Dogs (MDD), hosted a reception with some of the dogs, charity workers and researchers to celebrate the charity at Clarence House, London.MDD trains lifesaving medical alert assistance dogs and bio detection dogs, both of which can be trained to detect even the tiniest trace of the smell caused by a medical condition.