Explain the role of vaccination in controlling the spread of of diseases (2) marks
Biology
ScanSolve AI Answer
Vaccination works by introducing a weakened or inactive form of a pathogen (or its components) into the body, stimulating the immune system to produce antibodies and memory cells. This provides immunity without causing the disease, so if the vaccinated individual encounters the actual pathogen, their body can quickly fight it off. When a large percentage of the population is vaccinated, it creates herd immunity, which reduces the overall transmission of the disease and protects vulnerable individuals who cannot be vaccinated.
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