How were the changes that took place in Russia as a result of World War I
different from those that took place in Western Europe?
O
A. Russia adopted a communist government, but Western European
countries did not.
O
B. Russia gained a substantial amount of new territory, but Western
European countries did not.
O
C. Russia experienced devastating losses due to Spanish flu, but
Western European countries did not.
O
D. Russia experienced high poverty and unemployment, but Western
European countries did not.

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.