I checked out my library's entire stack of books about the 1918 flu, and asked my dad the genealogy buff about family history at that time. Many people on both sides of my family caught it, but no one at all died. I think I've got the genes to survive a comeback.
My parents were both born in 1910 and I know that neither set of parents died from the 1918 flu. Neither did any of their siblings, 4 on my father’s side and 8 on my mother’s side. Any farther into the family I can’t say.