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Réponse expérimentale à cette question : La vaccine perd-elle son efficacité préservative après vingt ans d'insertion?. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.