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Thursday, September 17, 2026

Line for September 17, 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
    Elimination measles

    Measles is declared eliminated from the United States

  3. 3
    Discovery diphtheria

    The diphtheria bacterium is first seen under the microscope

  4. 4
    Elimination rubella

    Endemic rubella is declared eliminated in the United States

  5. 5
    Vaccine smallpox

    Edward Jenner sees cowpox protect milkmaids from smallpox: vaccination begins

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