This photograph shows a dying four-year-old girl and makes no attempt to disguise the stark reality of her suffering.
It was shared by the girl's father Andy Whelan on Facebook after he took the photo this week. 4 year old Jessica has terminal cancer and has just weeks to live.
Within 24 hours, Jessica’s photo had reached half a million people. The outpouring of empathy was overwhelming. An anguished howl of sorrow reverberated round the world.