Across
- 1. A crippling and potentially deadly infectious disease caused by the poliovirus, preventable by vaccine.
- 2. The ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells.
- 4. A substance used to stimulate the production of antibodies and provide immunity against diseases.
- 6. A viral infection that attacks the respiratory system, commonly known as the flu, preventable by vaccine.
- 7. ______ immunity is achieved when a significant portion of a population becomes immune to an infectious disease.
Down
- 1. A bacterium, virus, or other microorganisms that can cause disease.
- 3. A blood protein produced in response to and counteracting a specific antigen.
- 4. A small infectious agent that replicates only inside the living cells of an organism.
- 5. Referring to the immune system's ability to recognize and specifically target pathogens.