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Saturday, May 16, 2026

Line for May 16, 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 hepatitis B

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

  2. 2
    Discovery tetanus

    Kitasato isolates the tetanus organism from a patient

  3. 3
    Discovery measles

    The measles virus is isolated in tissue culture

  4. 4
    Vaccine measles, mumps, rubella

    The combined MMR vaccine is licensed

  5. 5
    Vaccine pneumococcal disease

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

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