Infectious Diseases

2. the process of being made resistant to an infectious disease, usually by means of a vaccine
5. micro-organisms capable of causing disease or illness
7. living organisms that can transmit infectious pathogens between humans and animals
9. the study of the outbreak of diseases, their causes, locations, and how various communities are affected by them
10. an infective agent that typically consists of a nucleic acid molecule in a protein coat
11. calculated by dividing the total number of infections with each pathogen by the population in the FoodNet surveillance system for that year
12. which diseases are the most common in the world
14. group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus
17. tailors its attack to a specific antigen previously encountered
18. occurring widely in a community at a particular time
19. a type of white blood cell called lymphocyte

1. ways in which the infectious agent enters the body
3. the reaction of the cells and fluids of the body to the presence of a substance that is not recognized
4. a widespread occurrence of disease over a whole country or the world at a particular time
6. diseases that are spread between people and animals
7. the ability of an organism to infect the host and cause a disease
8. the body's first line of defense against germs entering the body (inate immune system)
13. student at RHS
15. place in which infectious agents live, grow, and reproduce
16. a key player in the adaptive immune response that is responsible for humoral immunity in mammals