Across
- 1. Infections communicable diseases whose occurence in humans has increased within the past two decades or threatens to increase in the near future
- 4. a piece of genetic material surrounded by a protein coat
- 5. an organism that carries and transmits pathogens to humans or other animals
- 8. the yellowing of the skin and eyes
- 11. Disease a disease that is spread from one living organism to another or through the environment
- 14. System a network of cells, tissues, organs, and chemicals that fights off pathogens
- 15. a protein that acts against a specific antigen
- 16. an infection of the lungs in which the air sacs fill with infection and other fluids
- 17. Tract the passage way that makes breathing possible
- 20. a global outbreak of an infectious disease
Down
- 2. a state of being protected against a particular disease
- 3. scarring of the liver
- 6. a preparation of dead or weakened pathogens that are introduced into the body to stimulate an immune response
- 7. Response a reaction to tissue damage caused by injury or infection
- 9. substances that kill cells or interfere with their functions
- 10. Membrane the lining of various body cavities, including the nose, ears, and mouth
- 12. substances that can trigger an immune response
- 13. single-celled microorganisms
- 18. a condition that occurs when pathogens in the body multiply and damage body cells
- 19. disease outbreak that effects many people in the same place and at the same time