Admission rates for urticaria more than doubled while almost twice as many people were hospitalised for angio-oedema.

BBC: NEWS | Health | Severe allergies 'rising sharply'

Patient B was taken to a nursing home but was readmitted the next day, when she died of a pulmonary oedema.

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And in December 1791, the month of his death, the researchers found oedema to be far more prevalent among men of his young age.

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But they add that "the known facts of Mozart's fatal illness, including the features of oedema, malaise and back pain, seem compatible with this diagnosis".

BBC: Mozart 'killed by strep throat'

Another 18% were admitted for food allergies, with the remaining 17% admitted for angio-oedema - deep swelling underneath the skin, often around the eyes and lips, and sometimes on hands and feet.

BBC: NEWS | Health | Severe allergies 'rising sharply'

They analysed more than 5, 000 cases between 1791 and 1793 and found oedema (a swelling caused by the build-up of fluid beneath the skin) to be the third most common cause of death after tuberculosis and malnutrition.

BBC: Mozart 'killed by strep throat'