Healthcare workers and infants at high risk are routinely immunised against the Hepatitis B virus (HBV). Which statement describes a scientifically accurate reason or biological mechanism for this health monitoring and maintenance strategy?
The vaccine introduces the recombinant Hepatitis B surface antigen (HBsAgHBsAgHBsAg) to induce active immunity, significantly reducing the host's long-term risk of developing chronic cirrhosis and hepatocellular carcinoma.
As HBV is a flagellated bacterium, the vaccine stimulates the production of specialized antitoxins that assist prescribed antibiotics in lysing the bacterial cell wall.
The vaccine delivers pre-formed monoclonal antibodies to provide immediate passive immunity that is cross-protective against all other blood-borne viral hepatitides, such as Hepatitis C.
The vaccine acts as a post-exposure therapeutic cure that targets and reverses established malignant liver tumours in individuals with advanced chronic infections.
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.