1924

First chapter of Delta Omega established at Johns Hopkins University School of Public Health

1925

Delta Omega holds its first National Meeting

1931

First classic is published: Typhoid Fever, Its Nature, Mode of Spreading and Prevention

1939

Delta Omega National Office sponsors first lecture series

1942-1944

Delta Omega activities cease during World War II

1978

Student essay contest established

1997

ASPH signs agreement with Delta Omega and becomes secretariat of the National Chapter

1998

First student poster session is held

1998

Delta Omega Web site is launched

1998

First classics are posted as PDF files on the Delta Omega Web site

1999

Launch of the online Delta Omega Member Database

2000

Delta Omega bylaws are amended to allow chapters to induct honorary members

2001

First Delta Omega Award for Innovative Public Health Curriculum is presented

2006

Delta Omega sponsors publication of Public Health Reports: Historical Collection 1878-2005