Declining prevalence of hepatitis A virus antibodies among children from low socioeconomic groups reinforces the need for the implementation of hepatitis A vaccination in Brazil

Vitral CL, Ospina FLN, Artimos S, Melgaço JG, Cruz OG, de Paula VS, Luz SB, Freire M, Gaspar LP, Amado LA, Engstrom EM, Fortes CDFM, Souza TC de, Dias MN, Gaspar AMC, Souto FJD. Declining prevalence of hepatitis A virus antibodies among children from low socioeconomic groups reinforces the need for the implementation of hepatitis A vaccination in Brazil. Mem Inst Oswaldo Cruz. 2012; 107(5): 652–8.