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Wednesday, August 26, 2026

Line for August 26, 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
    Vaccine polio

    The first oral polio vaccines are licensed

  2. 2
    Eradication smallpox

    The last known natural smallpox case, in Somalia

  3. 3
    Vaccine shingles

    The first shingles (zoster) vaccine is licensed in the U.S.

  4. 4
    Vaccine hepatitis B

    The first hepatitis B vaccine is licensed in the U.S.

  5. 5
    Vaccine polio

    The inactivated polio vaccine (IPV) is licensed

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