2689
One DALY can be thought of as one year of healthy life lost , and the overall disease burden can be thought of as a measure of the gap between current health status and the ideal health status ( where the individual lives to old age free from disease and disability ) .
 old age, disability
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 old age, disability