Line for January 19, 2026

Earliest

1. 1
   Vaccine polio

   The first oral polio vaccines are licensed

   Position 12345
2. 2
   Campaign smallpox

   WHO starts a plan to rid the world of smallpox

   Position 12345
3. 3
   Elimination HIV and syphilis (mother to child)

   Cuba is the first country validated for ending mother-to-child HIV and syphilis

   Position 12345
4. 4
   Discovery measles

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

   Position 12345
5. 5
   Elimination polio

   The WHO African Region is certified free of wild polio

   Position 12345

Latest

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