Alzheimer's is the most common form of dementia, behind 60 to 70 % of the cases.
At an early stage of its development, the disorder is associated with a difficulty to remember recent events.
As it evolves, new symptoms will emerge, preventing daily tasks to be achieved. Patients can eventually experience confusion and disorientation, mood swings, behavour changes and severe memory loss. They may additionally face motor problems, impairing functions like speaking, swallowing and walking.
Aging is the most important risk factor for Alzheimer's disease and other forms of dementia. Since life expectancy is increasing around the world, the number of people facing one day dementia is expected to grow.
According to Alzheimer's disease International estimates, around 47 million people worldwide were affected by dementia in 2015. This number is expected to grow to 75 million in 2030 and to reach 131 million in 2050. Acknowledging these numbers, the World Health Oraganization (WHO) considers the condition as a "public health priority".