It was not until the 1930s that researchers established that influenza was in fact caused by a virus, not a bacterium. Pfeiffer's influenza bacillus would eventually be named Haemophilus influenzae, the name retaining the legacy of its long-standing, though inaccurate, association with influenza.
And today, influenza vaccines – as well as H. influenzae type b vaccines—are widely available to prevent illness.
Yes. I provided you an article about that. Read the whole thing; it offers a more detailed account of the development of actual flu vaccines.
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