Symptoms of the Flu: An Overview. It's easy to confuse a common cold with flu symptoms. However, cold symptoms are usually milder and don't last as long as the flu symptoms. If you become infected with the flu virus, you will usually feel flu symptoms 1 to 4 days later. It is important to note that you can spread the flu to others before your flu symptoms start and for another 3 to 4 days after your flu symptoms appear. (Click Flu Virus for more information about the flu.).
Definition of Dependency Ratio: The dependency ratio measures the % of dependent people (not of working age) / number of people of working age (economically active). Dependency Ratio =.
another way to measure population aging. *Elderly Dependency Ratio: # of persons 65+ per 100 working age persons * Child Dependency Ratio: # of persons under 18 relative to those of working age * Total Dependency Ratio: combined ratio of children and older people to workers.