VICTOR ERICE, El Sur

In the seventeenth century, nostalgia was considered to be a curable disease, akin to a severe common cold. Swiss doctors believed that opium, leeches, and a journey to the Swiss Alps would take care of nostalgic symptoms.

By the end of the eighteenth century, doctors discovered that a return home did not always treat the symptoms. 

In fact, once at home, the patients often died.

SVETLANA BOYM, Nostalgia and its Discontents