Reminder that the most deadly pathogen in human history, the Spanish flu, was leaked from a human lab in the 1970s. It had previously been wiped out. Now you know it as influenza A subtype H1N1, an endemic disease in humans.https://twitter.com/diviacaroline/status/1252813408769990656 …
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Or not: quick search says 50m for Spanish flu, 75-100m for bubonic plague
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