Across
- 4. tiny, single-celled living organisms
- 5. the percentage of infected people in a population
- 9. an infectious microbe consisting of a segment of nucleic acid
- 11. a disease which can be transmitted to humans from animals
- 13. the harm a pathogen does to its host
- 15. virus, bacteria,fungi,protozoa,worms
- 16. branch of medicine which deals with the incidence, distribution, and possible control of diseases
- 18. an epidemic of an infectious disease that has spread across a large region
- 19. apart of the adaptive immune response that is responsible for immunity in mammals
Down
- 1. direct transfer of bacteria,viruses and other germs from one person to another
- 2. people, animals, food, wild animals, soil, water
- 3. mosquitos, ticks, fleas
- 6. preparation used to simulate the bodies protection against disease
- 7. a widespread occurrence of an infectious disease in a community at a particular time
- 8. responds in the same way to all germs and foreign substances
- 10. the body's ability to stay safe by protecting against harmful agents
- 12. a type of white blood cell called lymphocytes
- 14. tailors its attack to a specific antigen previously encountered
- 17. the number of new cases in a specific time period