The immune system ducksters

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Across
  1. 3. B cells are also called B_____
  2. 6. Scientist call the invaders that can cause disease _______
  3. 7. The immune system is very smart and can adapt to new ______
  4. 9. We can also gain immunity from _______
Down
  1. 1. Your body responds much ________ and ________ the second time it sees an antigen.
  2. 2. Antigens ignore ________ cells
  3. 4. Babies get antibodies from their ________
  4. 5. Vaccines introduce microbes that are already _______
  5. 6. When our bodies develop immunities over time through the immune system this is called ________
  6. 8. The immune system helps to protect us against disease caused by _______