medicine in the 19th century

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Across
  1. 2. To give a weak form of a disease to a person or animal, usually by injection, as a protection against that disease
  2. 3. Heating liquid or food to kill microorganisms
  3. 4. A heart monitor invented by Willem Einthoven in the early 1900’s
  4. 5. Medicines that treat infections by killing bacteria.
  5. 9. The Romans built these to transport fresh water to highly populated areas.
  6. 11. A substance used to stimulate the production of antibodies and provide immunity against a disease
  7. 12. An organism that can be seen only through a microscope. Examples include bacteria, protozoa, algae, and fungi.
Down
  1. 1. The belief that the substances that make up the human body are: black bile, yellow bile, blood, and phlegm.
  2. 6. Protected against, not affected by a disease
  3. 7. A substance that stops or slows down the growth of microorganisms
  4. 8. A powerful Xray that provides a cross-section of the human body invented in 1972
  5. 10. An unpleasant or unhealthy smell or vapour.