germs

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Across
  1. 6. they are viruses caused by tiny invaders
  2. 9. helps protect us against disease
  3. 10. destroys cells that have been infected by the invaders
Down
  1. 1. use to help our immune system be ready for a certain sickness
  2. 2. these cells produce antibodies
  3. 3. when our bodies develop immunities over time through the immune system
  4. 4. when we are born, our bodies may already have some immunity
  5. 5. remember antigens that have attached the body before
  6. 7. scientist call the invaders that can cause disease________.
  7. 8. get rid of good cells that have been infected by the invaders