During a global health emergency involving a highly contagious viral disease, a public health organization deploys two distinct immunological interventions: a prophylactic vaccine consisting of attenuated viral particles, and an emergency therapy consisting of monoclonal antibodies harvested from recovered patients.
Which of the following statements correctly compares the physiological mechanisms and immunological outcomes of these two interventions?
The vaccine provides rapid, short-term passive immunity by introducing pre-formed memory cells, while the monoclonal antibody therapy stimulates the host's helper T cells to produce active, long-term immunity.
The vaccine induces active immunity by presenting viral antigens that trigger the clonal selection of lymphocytes and the generation of memory cells, whereas the monoclonal antibody therapy provides immediate passive immunity but does not establish immunological memory.
The vaccine destroys viral pathogens directly using chemical adjuvants to trigger active immunity, whereas the monoclonal antibody therapy introduces synthetic memory cells that replicate inside the host's lymphatic system.
Both treatments induce active immunity by stimulating the recipient's plasma cells to secrete endogenous antibodies, but the vaccine requires multiple booster doses because it relies on passive cellular components.
97 exam-style questions on OCR GCSE Biology 6.3 Monitoring and maintaining health, covering 6.3.1 Health and disease, 6.3.2 Interactions between diseases, 6.3.3 Spread of communicable diseases, 6.3.4 Common infections and diseases, 6.3.5 Physical plant defence responses, 6.3.6 Chemical plant defence responses, 6.3.7 Detecting and identifying plant diseases, 6.3.8 White blood cells and platelets, 6.3.9 Non-specific defence systems, 6.3.10 The immune system, 6.3.11 Monoclonal antibodies, 6.3.12 Vaccines and medicines, 6.3.13 Aseptic techniques, 6.3.14 Discovery and development of new medicines, 6.3.15 Causes of non-communicable diseases, 6.3.16 Treatments for cardiovascular disease, 6.3.17 Lifestyle factors and non-communicable diseases, 6.3.18 Cancer, 6.3.19 Stem cells in medicine, 6.3.20 Gene technology in medicine, and 6.3.21 The human genome and medicine. Each one has a worked solution and a mark scheme showing where the marks go.