Antibodies that protect against a disease may be obtained in several different ways. Which of the following result in active immunity?
- A1 and 2 only
- B1 and 3 only
- C2 and 3 only
- D1, 2 and 3
Biology 0610 · IGCSE · Diseases and immunity
Antibodies that protect against a disease may be obtained in several different ways. Which of the following result in active immunity?