A food-borne outbreak of hepatitis A virus (HAV) infection in a secondary school in Upper Normandy, France, in November 2006 Schwarz, N G and Revillion, M and Roque-Afonso, A M and Dussaix, E and Giraud, M and Liberpre, C and Couturier, E and Delarocque Astagneau, E, Eurosurveillance, 13, 18885 (2008), https://doi.org/10.2807/ese.13.22.18885-en