Which of the following statements are correct about a country with a high dependency ratio? A. The country would have a well-funded education and health care system
B. The working class would have low taxes due to how low the costs for social security would be.
C. The majority of citizens in the country are contributing to the economy
D. There are very few citizens who are currently retired
E. None of the above
F. All of the above

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.