Do people know that the 1890 pandemic was likely caused by another coronavirus, OC43 (that was then novel?) Nowadays, no longer novel, it is one of the causes of the common cold. We're obviously not living in the OC43 pandemic since, and we won't live in a COVID pandemic forever.
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The 2009 pandemic flu had a lower IFR than the seasonal H1N1 it bumped off the face of the earth. That essay gets a lot of things right, but he's totally missing antigenic imprinting/OAS & the role antigenic similarity can play in making infections more severe w/ a few diseases.
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