[pombrand]

I.e 5x deadlier than the seasonal flu TODAY with an approx 0.1% mortality rate in the US, which has been decreasing steadily, so perhaps only 2-3x deadlier than the normal seasonal flu today on average.

"In 1918, doctors lacked intensive care units, respirators, antiviral agents, and antibiotics, an important fact in light of historical evidence of interactions between influenza and secondary bacterial respiratory pathogens (e.g., Haemophilus influenzae) as a significant cause of death during the pandemic." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2374803/