Line for August 3, 2026

Earliest

1. 1
   Elimination polio

   The WHO African Region is certified free of wild polio

   Position 12345
2. 2
   Vaccine measles, mumps, rubella

   The combined MMR vaccine is licensed

   Position 12345
3. 3
   Vaccine rotavirus

   The first rotavirus vaccine is licensed, then withdrawn the next year

   Position 12345
4. 4
   Discovery rotavirus

   Rotavirus is identified as a cause of diarrhea

   Position 12345
5. 5
   Campaign Guinea worm

   Guinea worm is down to 14 human cases in a year

   Position 12345

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