anyone separated from their native place for a long time was vulnerable to nostalgia.

At first, nostalgia was considered a particularly Swiss affliction.Some doctors proposed that the constant sound of cowbells in the Alps
caused trauma to the ear drums and brain.Commanders even forbade their soldiers from singing traditional Swiss songs
for fear that they'd lead to desertion or suicide.But as migration increased worldwide,nostalgia was observed in various groups.
It turned out that anyone separated from their native place for a long time was vulnerable to nostalgia.