I won't claim to be an expert on 1918 influenza, but here's a reference for the claim I was making: https://pmc.ncbi.nlm.nih.gov/articles/PMC5481322/ https://pm

I won't claim to be an expert on 1918 influenza, but here's a reference for the claim I was making: https://pmc.ncbi.nlm.nih.gov/articles/PMC5481322/ https://pmc.ncbi.nlm.nih.gov/articles/PMC5481322/ After reading this, I am less sure of the claim "most", but it seems that opportunistic infection was an important factor. There were a few unpleasant ways to die...