Medical Breakthroughs

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Across
  1. 3. A threadlike structure of nucleic acids and protein found in the nucleus of most living cells
  2. 4. The first true antibiotic discovered by Alexander Fleming
  3. 6. The branch of science that deals with microorganisms
  4. 7. Treatment with a vaccine to produce immunity against a disease
Down
  1. 1. Insensitivity to pain especially as artificially induced by the administration of gases
  2. 2. A medical instrument for listening to the action of someone's heart or breathing
  3. 5. The branch of medicine that deals with diseases and abnormalities of the heart