A Tale of Plagues: The Plague was not just a medieval illness
historytoday.com
historytoday.com
https://www.amazon.com/Black-Death-Golden-Gate-America/dp/03...
Maybe that's a reason for it
The other piece I've seen discussing the 1918 flu was pointing out that there's something of a standard for using 100-year averaged mortality from disease, and in 2019 there would suddenly be a gigantic drop in that supposedly smooth statistic.
It seemed like it was relevant to modern discussion to me.
> A quick glance shows me that I have three books about it on my kindle right now; it is ever-present.
You are not a good sample. Discussion of the flu is almost nonexistent, but you are a person who has three books about it. You are not in a position to judge whether other people talk about it.
In comparison, it seems like you can't touch on medieval history without getting into the Black Death, and medieval-tinged fantasy is rife with fictional analogues.
In the US, we are taught about the Spanish Flu in school. The news mentions the Spanish Flu every year during flu season. Every other epidemic movie mentions the Spanish Flu. There are even documentaries about it.
https://www.pbs.org/wgbh/americanexperience/films/influenza/
Without a doubt WW1 overshadows the Spanish Flu, but that doesn't mean it is anywhere close to being forgotten.