Passive immunity does not last long because

  1. it uses vaccines
  2. no memory cells are formed
  3. it destroys lymphocytes
  4. antibodies are too large
Answer

B) no memory cells are formed

Antibodies are broken down. AS & A Level Biology · Topic 11 Immunity · 11.2 Antibodies and vaccination

Biology MCQ · More A Level Biology: Immunity MCQs · Practise