Talk:Vaccines: Revision history

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23 March 2019

22 March 2019

  • curprev 23:5623:56, 22 March 2019‎ Wiki1 talk contribs‎ 3,681 bytes +3,681‎ Created page with ""Polio was virtually unknown before the end of the 19th century. Although the disease was first noted in 1789, only isolated cases surfaced until the first epidemic struck a v..."
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