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Until 1990, the immunization policy against hepatitis B in Spain was selective high-risk vaccination. That policy failed to reduce the incidence of hepatitis B and the prevalence rates of chronic carriers. In 1991, Catalonia began a universal immunization programme targeted at 12-year-olds. Six other regions (Castilla-Leon, Valencia, Extramadura, Navarra, the Balearic Islands and Rioja) introduced...
Until 1990, the immunization policy against hepatitis B in Spain was selective high-risk vaccination. That policy failed to reduce the incidence of hepatitis B and the prevalence rates of chronic carriers. In 1991, Catalonia began a universal immunization programme targeted at 12-year-olds. Six other regions (Castilla-Leon, Valencia, Extramadura, Navarra, the Balearic Islands and Rioja) introduced...
Until the early 1990s, the hepatitis B prevention strategy in Spain was based exclusively on selective vaccination of high-risk groups. However, this strategy proved inadequate in reducing the incidence of disease and the prevalence rate of chronic carriers. In October 1991, the Autonomous Region of Catalonia embarked on a programme of universal immunization targeted at 12-year-olds. A few months...
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