Line for June 4, 2026

Earliest

1. 1
   Discovery diphtheria

   The diphtheria bacterium is first seen under the microscope

   Position 12345
2. 2
   Campaign tuberculosis

   March 24 is recognized as World TB Day, a century after Koch

   Position 12345
3. 3
   Treatment bacterial infections

   A Nobel Prize for penicillin "and its curative effect"

   Position 12345
4. 4
   Eradication rinderpest (a cattle disease)

   The last identified case of rinderpest, the second disease ever eradicated

   Position 12345
5. 5
   Vaccine hepatitis B

   The first recombinant hepatitis B vaccine is licensed

   Position 12345

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