Well that’s a complicated question. Many people with progressive diseases of the brain, termed neuro-degenerative diseases like Alzheimer’s tend to have complications. As the disease progresses, it affects more of the brain, which can lead to more problems. For example, most people with end-stage Alzheimer’s disease are prone to loosing control of their swallow reflex which results in recurring pneumonia. There is also increasing frailty due to loss of appetite, or cessation of eating and drinking. Loss of motor function results in them being bedridden and unable to look after themselves. This results in increased risk of infections. They may also have other health issues.
In reality it varies between each individual.
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