title: [Study of an epidemic of HBsAg, subtype (ay), hepatitis (author's transl)].
mesh_terms: D003428:Cross Infection / Q000453:epidemiology*; D004196:Disease Outbreaks; D006509:Hepatitis B / Q000453:epidemiology*; D006801:Humans; D006435:Renal Dialysis / Q000009:adverse effects; D012306:Risk; D013030:Spain
vernacular_title: Etude d'une épidémie d'hépatite HBsAg-positive, sous-type (ay)