The 80 per 10,000 number is in the NIH paper. It's "influenza-attributable excess mortality in fall 1918" after adjusting for baseline mortality:
"Crude rates of mortality due to respiratory conditions displayed a W shape in fall 1918, peaking in infants, young adults, and seniors. We subtracted baseline mortality in prepandemic years to obtain influenza-attributable excess mortality in fall 1918. The highest rates of influenza-related excess mortality were found in infants < 1 year old. Three breakpoints were identified in the age-specific mortality curve: a minimum, at age 9.7 years (1908 birth cohort), with a rate of 15 deaths per 10 000; a maximum, at age 25.6 years (1892 birth cohort), with a rate of 80 deaths per 10 000;
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3563305/
Sorry, but it’s not 1918, and if this is the start of another pandemic, I’ll apologize.
But if it’s not, I would like to know what the REAL cause of death is for her, as I very much doubt that she just happened to be the one in 100,000 picked to die from it.