Preparing for a swine flu pandemic that never materialized may have inadvertently caused the reemergence of an extinct H1N1 virus, leading to the 1977 “Russian flu” pandemic.
https://theconversation.com/preparing-for-a-pandemic-that-never-came-ended-up-setting-off-another-how-an-accidental-virus-release-triggered-1977s-russian-flu-236297
#science #health #history
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