Spanish Flu did not kill 50.000.000. Vaccines did

https://crazzfiles.com/the-vaccine-that-killed-50000000/
https://tinyurl.com/ydcf5y87
https://academic.oup.com/cid/article/69/Supplement_5/S385/5587093

Influenza: Spanish Influenza Pandemic and Vaccines

In the deadly Spanish influenza pandemic of 1918-19, investigators attempted to develop vaccines to prevent influenza, though they had not yet correctly identified the causative pathogen. A variety of killed whole cell bacterial vaccines were tested; these vaccines included Bacillus influenzae (now know as Haemophilus influenzae) and strains of pneumococcus, streptococcus, staphylococcus, and Moraxella catarrhalis bacteria. These vaccines would certainly not have prevented influenza infection--as we know now, the pandemic was caused by a new strain of the influenza A virus. Influenza viruses would not be isolated and identified until the 1930s, and the first commercial influenza vaccines were not licensed in the United States until the 1940s.
https://www.historyofvaccines.org/timeline#EVT_100531

Electron microscopy (EM) has long been used in the discovery and description of viruses. Organisms smaller than bacteria have been known to exist since the late 19th century (11), but the first EM visualization of a virus came only after the electron microscope was developed. Ernst Ruska, with his mentor Max Knoll, built the first electron microscope in 1931 as the project for his Ph.D. thesis. Eight years later, Ruska and colleagues Kausche and Pfankuch were the first to visualize viruses
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2772359/

If viruses could only been seen after the invention of the electronic microscope in 1931. How did they know that the Spanish flu was in fact the flu

Should look into
The germ theory v The terrain theory
http://maronewellness.com/pasteur-vs-bechamp-an-alternative-view-of-infectious-disease/

Symbiosis or Parasitism - Enderlein Polymorphic Milieu - Our Blood Microbes Change Shape and Action.
https://www.youtube.com/watch?v=fqLmemM-0co

Aspirin and the 2018 Spanish Flu
https://fromthetrenchesworldreport.com/bayer-and-death-1918-and-aspirin/258445
https://rielpolitik.com/2020/04/24/big-pharma-bayer-and-death-1918-aspirin-part-1-by-j-holcombe-d-jacobson-t-ruhl/

https://www.historyofvaccines.org/content/blog/vaccine-development-spanish-flu

https://www.thebernician.net/scientists-proved-viruses-are-not-contagious-in-1918/