What is the difference between dementia and Alzheimer’s disease?

Dementia is an umbrella term used to describe a group of diseases characterized by progressive worsening of cognitive function (memory, language, problem-solving and other thinking abilities) that is severe enough to interfere with daily life.

There are various types of dementia, and the most common type is Alzheimer’s disease. About 60-70% of people with dementia do have Alzheimer’s disease.

It is like a rose is one specific kind of flower, whereas the word "flower" is used to refer to anything that is "the part of a plant that produces new seeds".

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