Passive immunity is short-term because

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

B) no memory cells are made

Borrowed antibodies break down. O Level Biology · Topic 12 Disease and Immunity · 12.3 Immunity

Biology MCQ · More O Level Biology: Disease and Immunity MCQs · Practise