Line for March 24, 2026

Earliest

1. 1
   Eradication smallpox

   The last known natural smallpox case, in Somalia

   Position 12345
2. 2
   Elimination smallpox

   Smallpox is eliminated in North America

   Position 12345
3. 3
   Campaign polio

   The World Health Assembly resolves to eradicate polio

   Position 12345
4. 4
   Discovery measles

   A Scottish physician shows measles is caused by an infectious agent in the blood

   Position 12345
5. 5
   Vaccine measles

   The first live measles vaccine is licensed in the U.S.

   Position 12345

Latest

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