Communicable Diseases

5. A protein that acts against a specific antigen
6. Substances that can trigger an immune response
7. Scarring of the liver
9. A disease outbreak that affects many people in the same place and at the same time
12. The state of being protected against a particular disease
14. An organism that carries and transmits pathogens to humans or other animals
16. a viral infection that causes inflammation of the liver
19. A specialized white blood cell that coordinates and performs many functions of specific immunity
21. A network of cells, tissues, organs, and chemicals that fights off pathogens
22. Symptoms include sore throat, fever, and enlarged lymph nodes in the neck.
23. The lining of various body cavities, including the nose, ears, and mouth
24. A preparation of dead or weakened pathogens that are introduced into the body to stimulate an immune response

1. a viral infection of the respiratory tract
2. A yellowing of the skin and eyes
3. A microorganism that infects the digestive system
4. A global outbreak of an infectious disease
8. A condition that occurs when pathogens in the body multiply and damage body cells
10. A reaction to tissue damage caused by injury or infection
11. a bacterial disease that usually attacks the lungs
13. Single-celled microorganisms
15. A disease that is spread from one living organism to another or through the environment
17. An infection of the lungs in which the air sacs fill with pus and other liquids
18. Substances that kill cells or interfere with their functions
20. A piece of genetic material surrounded by a protein coat