Abstract
The world population aged more than 50 years will increase in number from 396 million in 1950 to 2129 million in 2025. We are facing an era of elderly, physically increasingly incapacitated populations. Degenerative and other age-dependent disorders, diseases and handicaps will increase in all countries during the next thirty years. Since, in addition, the elderly parts of the populations increase proportionately faster than other age-groups, the increasing economic burden of health expenditure will be carried by relatively smaller parts of populations.