Court of Justice 21 June 2017, Case C-621/15: Judgment of the Court (Second Chamber) of 21 June 2017 (request for a preliminary ruling from the Cour de cassation — France) — N.W, L.W, C.W v Sanofi Pasteur MSD SNC, Caisse primaire d’assurance maladie des Hauts-de-Seine, Carpimko (Reference for a preliminary ruling — Directive 85/374/EEC — Liability for defective products — Article 4 — Pharmaceutical laboratories — Vaccination against hepatitis B — Multiple sclerosis — Proof of defect of vaccine and of causal link between the defect and the damage suffered — Burden of proof — Methods of proof — Lack of scientific consensus — Serious, specific and consistent evidence left to the discretion of the court ruling on the merits — Whether permissible — Conditions)

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