Ann Struthers, an 18-year-old college student, developed a sore throat while on holiday in Scotland in June 2013. When she returned home to the Isle of Man she complained of a cough, became lethargic and was unable to breathe.

Her temperature was so low that her mother, Dee, thought the thermometer had broken. Two weeks later she was dead: doctors had been unable unable to treat her infection.

In hospital, she was initially diagnosed with intercostal muscle pain and she was sent home with painkillers and anti-inflammatory medication. But that night Ann could not stand and began hallucinating, calling out for her grandfather who had died 10 years earlier.