GENEVA( AFP, REUTERS)-Dementia, which robs people of their" memories, independence and dignity", is on the rise worldwide, but few countries are equipped to fight it, the World Health Organisation has warned.In a report, the WHO said that dementia, caused by a variety of diseases and injuries that affect the brain, such as Alzheimer's or stroke, affects more than 55 million people in what has become a" global public health concern". That figure is set to rise to 78 million by 2030 and 139 millio