Which of the following is the MOST useful index for the measure of the burden of disease in a defined population?

Disability adjusted life years (DALY) is a measure of the burden of disease in a defined population and the effectiveness of the intervention. Case fatality rate indicates killing power of a disease. REMEMBER: Sullivan's index is the most advanced indicator available for disability Ref: Park's textbook of Preventive and Social Medicine, 21st edition, page-26