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Tuesday, January 27, 2026

Line for January 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
    Elimination measles

    Measles is declared eliminated from the United States

  2. 2
    Campaign tuberculosis

    March 24 is recognized as World TB Day, a century after Koch

  3. 3
    Vaccine measles

    The first live measles vaccine is licensed in the U.S.

  4. 4
    Discovery tetanus

    Kitasato isolates the tetanus organism from a patient

  5. 5
    Eradication smallpox

    The last known natural smallpox case, in Somalia

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