“since the emergence of the new coronavirus, some scientists have revisited a theory that a pandemic in 1890, which killed about one million people worldwide, may have been caused by OC-43, one of the four common cold coronaviruses.”

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Link. For today’s population that would be 5 million, and the population in 1890 skewed much younger. So today maybe 6-9 million dead from OC-43 were it to appear today. Now it causes a runny nose.