GCSE Biology Vaccination
Vaccination involves introducing small quantities of dead or inactive forms of a pathogen into the body to stimulate an immune response.
Do you know how memory cells work?
What is Vaccination?
"Vaccination is the process of introducing dead or inactive pathogens into the body to stimulate an immune response and provide protection."
How does a vaccine usually protect a person from future disease?
Why can vaccinating a large proportion of a population reduce the spread of disease?
Why does a vaccinated person usually respond faster if the same pathogen enters again later?
How Vaccines Work
Vaccines stimulate white blood cells to produce antibodies without causing the full disease.
If the same pathogen enters the body again, memory cells respond quickly to produce more antibodies.
Herd immunity occurs when a large proportion of the population is immune, making it difficult for the disease to spread.
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