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Saturday, August 15, 2026

Line for August 15, 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 polio

    The World Health Assembly resolves to eradicate polio

  2. 2
    Vaccine polio

    The inactivated polio vaccine (IPV) is licensed

  3. 3
    Vaccine polio

    The first oral polio vaccines are licensed

  4. 4
    Vaccine pneumococcal disease

    The first pneumococcal vaccine is licensed in the U.S.

  5. 5
    Discovery measles

    The measles virus is isolated in tissue culture

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