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Across
  1. 3. Introducing a pathogen or antigen into the body to stimulate immunity
  2. 4. A widespread eruption of skin lesions, a symptom of smallpox.
  3. 7. A widespread occurrence of a disease in a community at a particular time.
  4. 9. Complete elimination of a disease from the world.
  5. 11. Resistance to a particular infection or toxin due to the presence of specific antibodies.
  6. 12. An outbreak of a disease that affects a large geographic area, often worldwide.
Down
  1. 1. Easily spread from person to person.
  2. 2. A biological preparation that provides active acquired immunity to a particular disease.
  3. 5. Abnormal changes in body tissue caused by disease or injury.
  4. 6. Isolation to prevent the spread of disease.
  5. 8. A woman who traditionally worked closely with cows and was key to Jenner's smallpox vaccine discovery.
  6. 10. The scientist known for developing the first smallpox vaccine using cowpox virus.