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Sunday, February 22, 2026

Line for February 22, 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
    Campaign smallpox

    WHO starts a plan to rid the world of smallpox

  2. 2
    Elimination polio

    The last case of wild polio acquired in the United States

  3. 3
    Elimination HIV and syphilis (mother to child)

    Cuba is the first country validated for ending mother-to-child HIV and syphilis

  4. 4
    Discovery rubella

    The rubella virus is isolated

  5. 5
    Vaccine measles, mumps, rubella

    The combined MMR vaccine is licensed

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