What might account for a higher level of Euroscepticism in Great Britain than in continental European nations? Economic prosperity and a strong sense of nationalism
Outsourced industries and high unemployment in the nation
The rejection of the Euro as their currency and a higher level of education amongst citizens
Higher levels of inter-European immigration and reported human rights violations

The answer to that question is a

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.

He sailed off course on his way back to greenland and ended up in north america