Vaccines

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