Immunity Puzzler

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Across
  1. 2. A hormone produced by the pancreas that prevents diabetes
  2. 5. Devices made to ease strain and prevent injury
  3. 6. A class of diseases caused by the immune system attacking the body
Down
  1. 1. A compound that boosts immune responses
  2. 3. A condition that affects the nerves, reducing mobility
  3. 4. A disease that affects and weakens the joints