| [a change in the epidemiologic pattern of hepatitis a in spain]. | seroepidemiologic studies carried out in different countries show that the prevalence of markers for infection by hepatitis a (hva) is progressively decreasing in relation with improvement in the level of health care. the prevalence of anti-hva in catalunya and the factors related with infection by hva were studied in order to obtain bases for designing prevention strategies adequate for the epidemiology of this infection. | 1992 | 1321318 |