Throughout life, the immune system keeps the memory of past viral or bacterial aggressions. Each time a new antigen appears, certain immune cells are responsible for determining its identity card and keeping it pending future aggression.
Vaccination relies on this mechanism to stop the most dazzling antigens.

Film directed by Thierry Imbert from the Corpus website. With the support of the investment for the future (Estim). Duration: 3 min. 50 sec. Find all our films on