If a person commits a felony in one state and flees to another, why might that person face extradition? why wouldn't he or she be tried for his or her crime in the second state?

Because all states have their own rules. If the felony is not considered bad in the state he/she fled to then he/she might not get tried

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.