The number of deaths from dementia in the world has tripled, according to new data from the World Health Organization. Over the past two decades, dementia has risen from 19th to 5th in the world. The disease is more common among older people, so it is especially important to pay attention to changes in the behavior of older relatives. The first signs can easily be attributed to age: a person becomes irritable, forgets recent conversations or begins to get lost in familiar places. The cards tell you how to notice alarming symptoms in time.