Line for March 2, 2026

Earliest

1. 1
   Campaign smallpox

   WHO starts a plan to rid the world of smallpox

   Position 12345
2. 2
   Discovery rubella

   Rubella is described as a disease of its own ("German measles")

   Position 12345
3. 3
   Discovery diphtheria

   The diphtheria bacterium is first seen under the microscope

   Position 12345
4. 4
   Campaign Guinea worm

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

   Position 12345
5. 5
   Vaccine rotavirus

   The first rotavirus vaccine is licensed, then withdrawn the next year

   Position 12345

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