Line for May 11, 2026

Earliest

1. 1
   Discovery rotavirus

   Rotavirus is identified as a cause of diarrhea

   Position 12345
2. 2
   Vaccine measles, mumps, rubella, chickenpox

   The combined MMRV vaccine is licensed

   Position 12345
3. 3
   Elimination HIV and syphilis (mother to child)

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

   Position 12345
4. 4
   Treatment diabetes

   A Nobel Prize for the discovery of insulin

   Position 12345
5. 5
   Discovery tetanus

   Kitasato isolates the tetanus organism from a patient

   Position 12345

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