A 33-year-old medical researcher died from a cancer usually caused by asbestos, despite no history of being exposed to it, an inquest heard.
Rose Wharton died of mesothelioma at her Oxford home on 20 May, after being diagnosed in September.
Coroner Darren Salter said it was a "very unusual" case, because the illness usually only affects those who worked around asbestos for decades.
He told Oxford Coroner's Court he had never seen a case like it.
Most cases of mesothelioma are diagnosed in people aged between 60 and 80, according to the NHS.
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