Vaccines

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Across
  1. 4. Cells that remember past infections
  2. 5. A shot you get to protect yourself from diseases
  3. 7. A type of immunity gained through vaccination
Down
  1. 1. The body's ability to resist infection or disease
  2. 2. A disease-causing organism, like a virus or bacteria
  3. 3. The body's system that fights infections
  4. 6. A substance used in vaccines to trigger an immune response