Which of these statements explain why some vaccines can be taken orally but the tuberculosis (TB) vaccine must be injected?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 only
Biology 9700 · AS & A Level · Antibodies and vaccination
Which of these statements explain why some vaccines can be taken orally but the tuberculosis (TB) vaccine must be injected?