Line for May 30, 2026

Earliest

1. 1
   Discovery measles

   The measles virus is isolated in tissue culture

   Position 12345
2. 2
   Elimination measles

   Measles is declared eliminated from the United States

   Position 12345
3. 3
   Discovery measles

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

   Position 12345
4. 4
   Campaign measles

   Measles becomes a disease U.S. doctors and labs must report

   Position 12345
5. 5
   Discovery tuberculosis

   Robert Koch announces the germ that causes tuberculosis

   Position 12345

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