IIn 2013 the UN published a report estimating that by 2050 over 20% of the world's population will be 65 or older - the advance of medicine and the increase in global living standards means that the human race is living longer than ever before. An ageing population means that more of us are being diagnosed with age-related illnesses such as Alzheimer's. In 2015,there were 46.8 million people living with dementia, costing the world economy over $800 billion. With an estimated 131.5 million Alzheimer's sufferers by 2050, and understanding Alzheimer's is more distinguished than ever.
Source: phys.org