HEALTH AND THE IMMUNE SYSTEM 1

2. Drugs that stop bacteria from reproducing and kill them.
6. The study of the causes of a disease.
9. Objective evidence of disease as oberved by a doctor or anurse.
10. Transmission of pathogens from person to person.
12. Natural barriers of the body that make up the first line of defence.
13. Disease caused by a Protozoa that is endemic in tropical and subtropical areas.
15. Disease that lasts a long time.
17. Substances that are foreign to the body and that stimulate a specific immune response.
19. A disease that spreads rapidly and affects a large number of people at the same time.
20. Combination of physical, mental and social well-being.
21. Lymphocytes that recognize and destroy antigens
22. Type of white blood cells that carry out the specific immune response.
23. Pathogens that are not true living beings.
24. A disease that affects a very large geographical area or reaches all parts of the world.

1. Drugs that prevent growth and destroy the fungi.
3. Cells that make up the second line of defence of the body and that left the blood vessels.
4. Cells in which monocytes are transformed when they are outside the blood vessels and that ingest and destroy the pathogens.
5. Place where the pathogen lives and usually reproduces.
7. The person, animal or microorganism that carries and transmits the pathogen.
8. A disease that is continually present in a certain region or population.
9. Subjective evidence of disease as perceived by the patient.
11. Unicellular prokaryotic microorganisms that cause infectious diseases.
14. Disease that appears suddenly and does not last long.
16. Diseases caused by pathogens.
18. Lymphocytes that produce antibodies.
20. The organism that is infected.
23. Biological preparations made from weak or dead forms of a virus or bacteria that provide immunity to a specific disease.