Line for August 24, 2026

Earliest

1. 1
   Vaccine malaria

   WHO recommends the first malaria vaccine for wide use in children

   Position 12345
2. 2
   Elimination polio

   The WHO African Region is certified free of wild polio

   Position 12345
3. 3
   Discovery rubella

   The rubella virus is isolated

   Position 12345
4. 4
   Vaccine tetanus

   Tetanus toxoid is developed

   Position 12345
5. 5
   Discovery measles

   The measles virus is isolated in tissue culture

   Position 12345

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