The World Health Organization (WHO) recommends universal immunization of children (≥12 months of age) on the basis of (i) an increasing trend of HA over time, including the occurrence of severe disease in older children, adolescents, or adults; (ii) changes in endemicity from high to intermediate; and (iii) having evaluated cost-effectiveness [ 3 ].
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Epidemiological Transition and Strategies for the Control of Hepatitis A in Serbia.
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