Doris is the daughter of George A. J. and Elsie Jane Yetman Mielke. Doris was born on 22 January 1925 and died on 27 October 1928. She died of Black Diphtheria. She is buried at Woodmere Cemetery in Detroit, Michigan.
My grandmother was 4 years old when her little sister died. She remembers that she was not allowed to see her little sister or her mother (who also had Diphtheria). After her sister died she could only see her sister through a glass window.
From what I have read there is not a difference between Diphtheria and Black Diphtheria. Diphtheria is an infection of the nose and throat. It turns the throat gray or black (which is probably where “Black” Dipihtheria. To learn more about Diphtheria go here.