Why does a booster vaccine often provide a stronger immune response than the initial vaccine, specifically relating to B cells?

💡 Explanation

Booster vaccines lead to a heightened immune response because they drive B cell affinity maturation, where B cells producing higher affinity antibodies are preferentially selected and expanded. Therefore, the subsequent response has higher affinity antibodies, rather than relying on initial antibody production.

• In Alzheimer's disease, what distinguishes microglial-mediated amyloid-beta clearance from simple diffusion across the blood-brain barrier?
• A patient recovering from femur fracture has limited weight-bearing capacity. Which biomechanical change explains why early ambulation with crutches aids bone healing despite limited mechanical loading?
• Which risk increases when gallbladder bile secretion encounters occlusion?
• Which consequence results when systemic capillary leak develops due to endothelial cell glycocalyx degradation?
• If a patient's dehydration increases plasma osmolality, and ADH secretion is suppressed due to a rare collecting duct aquaporin-2 mutation, which consequence follows?
• A researcher introduces a novel antigen into a mouse model lacking mature B lymphocytes. Which consequence follows regarding adaptive immune response?