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Sunday, September 27, 2026

Line for September 27, 2026

Put these 5 milestones in time order, earliest at the top. The years appear when you lock in your order.

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Earliest

  1. 1
    Discovery rubella

    The rubella virus is isolated

  2. 2
    Vaccine mumps

    The Jeryl Lynn mumps vaccine is licensed in the U.S.

  3. 3
    Campaign smallpox

    WHO starts a plan to rid the world of smallpox

  4. 4
    Vaccine hepatitis B

    The first recombinant hepatitis B vaccine is licensed

  5. 5
    Elimination polio

    The last case of wild polio acquired in the United States

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