A Shropshire schoolgirl who died of an infection after being told she had swine flu may have survived if different diagnoses had been made, a coroner ruled.
But the Coroner for Mid and North Shropshire, John Ellery, said the initial diagnoses given to 16-year-old Charlotte Hartey were "reasonable ones to have made" when she was first taken ill.
A two-day inquest at Shrewsbury Magistrates' Court was told that Charlotte, from Bronygarth, near Oswestry, succumbed to an "incredibly rare" bacteria which caused tonsillitis and led to bronchial pneumonia.
The inquest earlier heard heard that the teenager was first triaged over the telephone during last year's swine flu pandemic and given anti-viral drugs.
A second doctor carried out a home visit two days later and agreed with the diagnosis of swine flu, but also prescribed antibiotics after noticing that Charlotte's throat was inflamed.
Charlotte was admitted to the Royal Shrewsbury Hospital on July 29 - seven days after being prescribed Tamiflu - when blood tests showed a high white blood cell count.
Mr Ellery, who heard that the hospital trust has since acted on 12 recommendations made by a report into the death, identified significant concerns in the care Charlotte received at the hospital prior to her death on July 31 last year.
Recording a narrative verdict, Mr Ellery said: "It is true that Charlotte died from natural causes, but that would not encapsulate the issues which this inquest has addressed.
"Charlotte was diagnosed with swine flu by telephone on July 22. This diagnosis was confirmed following a home visit by another doctor on July 24.
"The evidence indicated that such diagnoses were reasonable ones to have made at the time, but later investigations indicated that they were probably incorrect."