Infection Diseases

2. Ways in which the infectious agent is spread
4. Widespread occurrence of an infectious disease over a whole country or the world at a particular time
8. The action of structures and substances that are naturally present
12. Tiny, single-celled living organisms
13. Estimated number of newly infected through a specific immune response
14. The study of outbreaks of diseases, the causes, locations, and how various communities are effected
16. Reaction of cells and fluid when a substance is not recognized in the body
18. Places where infectious agents live, grow, and reproduce
20. They reprogram cells to help them reproduce

1. Number of people in a database that currently have a specific disease
3. Immunity that occurs in response to exposure to a particular antigen
5. Disease that can be transmitted from humans to animals
6. The severity of a disease
7. The cell that is responsible for humoral immunity in mammals
9. I play baseball and football for RHS
10. DNA Molecules that can transmit infectious diseases
11. Type of white blood cell called lymphocytes
15. Widespread occurrence of an infectious disease in a community at a particular time
17. Microorganism that causes said disease
19. Treatment using a vaccine to prevent a specific disease