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Vaccination is a procedure with the goal of protecting the organism from a specific infection by stimulating the immune system. The organism can defend itself thanks to the action of the lymphocytes which attack microorganisms and develop an immunological memory. A vaccine does not cure but protects the organism against an infectious disease, by a preventative and life-long mechanism.
The dashed graph curve represents a non-vaccinated individual. The solid graph curve characterise a vaccinated individual. The scales of the graph are not respected.
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