Line for August 21, 2026

Earliest

1. 1
   Treatment bacterial infections

   A Nobel Prize for penicillin "and its curative effect"

   Position 12345
2. 2
   Vaccine mumps

   The Jeryl Lynn mumps vaccine is licensed in the U.S.

   Position 12345
3. 3
   Eradication smallpox

   The last known natural smallpox case, in Somalia

   Position 12345
4. 4
   Discovery measles

   The measles virus is isolated in tissue culture

   Position 12345
5. 5
   Vaccine pertussis

   The first whole-cell whooping cough (pertussis) vaccines are licensed in the U.S.

   Position 12345

Latest

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