You mean the experimental meningitis vaccine laid the first blow.
whoa, never heard that.
"It is true that in early 1918, before the first cases of Spanish flu were reported at Camp Funston at Fort Riley in Kansas in March 1918 ( here ), a trial of a vaccine made with inactivated strains of the meningococcus bacteria ( here ) was conducted on military volunteers at the same location....For example, during the 1918 flu pandemic itself, experimental bacterial vaccines for influenza were used in army camps as well as on workers, including 275,000 employees of the U.S. Steel Company ( here , here , here )...
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