Line for August 14, 2026

Earliest

1. 1
   Vaccine tetanus

   Tetanus toxoid is developed

   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 shingles

   The first shingles (zoster) vaccine is licensed in the U.S.

   Position 12345
4. 4
   Vaccine hepatitis B

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

   Position 12345
5. 5
   Discovery diphtheria

   The diphtheria bacterium is first seen under the microscope

   Position 12345

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