In regard to https://www.rumormillnews.com/cgi-bin/forum.cgi?read=256634

"Results
The postmortem samples we examined from people who died of influenza during 1918–1919 uniformly exhibited severe changes indicative of bacterial pneumonia. Bacteriologic and histopathologic results from published autopsy series clearly and consistently implicated secondary bacterial pneumonia caused by common upper respiratory–tract bacteria in most influenza fatalities."
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https://www.cidrap.umn.edu/influenza-vaccines/study-bacterial-pneumonia-was-main-killer-1918-flu-pandemic

""Histological and bacteriologic evidence suggests that the vast majority of influenza deaths resulted from secondary bacterial pneumonia," says the report by David M. Morens, MD, Jeffery K. Taubenberger, MD, PhD, and NIAID Director Anthony S. Fauci, MD.

Many accounts of the 1918 pandemic have emphasized how quickly patients succumbed to the infection, creating an impression that a large share of the victims died of the virus's direct effects on the lungs or the immune system's intense response to the infection. But the new report suggests that more than 90% actually died of invading bacterial pneumonia after the virus wiped out cells lining the bronchial tubes and lungs."

"In essence, the virus landed the first blow while bacteria delivered the knockout punch," said Fauci in an NIAID news release."
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AP diversion from bacterial pneumonia: https://apnews.com/article/fact-check-fauci-study-1918-spanish-flu-masks-deaths-998351571536

AP’S ASSESSMENT: False. The study in question made no mention of masks. Instead, it found that many of the deaths were ---likely caused by a secondary bacterial pneumonia--- that followed influenza infection. There is no evidence masks were responsible, Fauci told The Associated Press.
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Covid 19 was never actually proved to exist.