Line for July 23, 2026

Earliest

1. 1
   Elimination malaria

   WHO certifies malaria gone from the United States

   Position 12345
2. 2
   Treatment bacterial infections

   A Nobel Prize for penicillin "and its curative effect"

   Position 12345
3. 3
   Vaccine measles, mumps, rubella

   The combined MMR vaccine is licensed

   Position 12345
4. 4
   Discovery tetanus

   Kitasato isolates the tetanus organism from a patient

   Position 12345
5. 5
   Campaign Guinea worm

   Guinea worm: about 3.5 million cases a year, the starting line for eradication

   Position 12345

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