Encephalitis Lethargica

Europe

1916

1916

January 1917

April 17 1917

1918

February 1919

1931

October 1931

1993

2002

2004

New York City

February 1918

1919

February 1919

1922 - 1927

1923 - 1931

1925

1929

1934 - 1945

1938

1945

1946

1966

March 1969

1982

2006