Line for October 6, 2026

Earliest

1. 1
   Discovery hepatitis B

   The hepatitis B surface antigen is first described

   Position 12345
2. 2
   Campaign Guinea worm

   Guinea worm: about 3.5 million cases a year, the starting line for eradication

   Position 12345
3. 3
   Vaccine pertussis

   The first whole-cell whooping cough (pertussis) vaccines are licensed in the U.S.

   Position 12345
4. 4
   Vaccine pneumococcal disease

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

   Position 12345
5. 5
   Elimination polio

   The WHO African Region is certified free of wild polio

   Position 12345

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