Line for June 7, 2026

Earliest

1. 1
   Vaccine measles

   An improved, weaker measles vaccine goes into use

   Position 12345
2. 2
   Vaccine malaria

   WHO recommends the first malaria vaccine for wide use in children

   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
   Discovery rubella

   The rubella virus is isolated

   Position 12345

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