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Thursday, March 26, 2026

Line for March 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 measles, mumps, rubella, chickenpox

    The combined MMRV vaccine is licensed

  2. 2
    Vaccine polio

    The inactivated polio vaccine (IPV) is licensed

  3. 3
    Vaccine pneumococcal disease

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

  4. 4
    Elimination polio

    The WHO African Region is certified free of wild polio

  5. 5
    Vaccine smallpox

    Edward Jenner sees cowpox protect milkmaids from smallpox: vaccination begins

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