Line for June 15, 2026

Earliest

1. 1
   Treatment bacterial infections

   A Nobel Prize for penicillin "and its curative effect"

   Position 12345
2. 2
   Vaccine smallpox

   Edward Jenner sees cowpox protect milkmaids from smallpox: vaccination begins

   Position 12345
3. 3
   Eradication smallpox

   The last known natural smallpox case, in Somalia

   Position 12345
4. 4
   Campaign smallpox

   WHO launches an intensified plan to eradicate smallpox

   Position 12345
5. 5
   Discovery diphtheria

   The diphtheria bacterium is first seen under the microscope

   Position 12345

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