33 (US$1) [20] (Table 2). As the second dose of the vaccine requires a new visit to the health center, transportation MAPK Inhibitor Library costs of this new visit were included in the model when the analysis was conducted from the society perspective. Health care utilization and costs of adverse events following hepatitis A vaccination were not considered, since they are rare and mild, and the associated costs may be considered insignificant [21]. To estimate the annual cost of the current strategy (vaccination of high risk persons),

we considered the total vaccine doses (157,611) administered in Brazil in 2008. Health care cost estimates, summarized in Table 2, were calculated by age group and area of residence. Direct medical costs were estimated for outpatient care, inpatient treatment, liver transplantation and follow up post transplantation. The standard outpatient care for acute hepatitis A was Tyrosine Kinase Inhibitor Library clinical trial based on expert opinion. The cost of health service utilization in public outpatient facilities was valued using the SUS procedures reimbursement prices in 2008, available in the Public Health Information System (Sistema

de Gerenciamento da Tabela de Procedimentos, Medicamentos e OPM do SUS, SIGTAP) [22]. The costs of cases treated in the private sector were estimated based on the 2008 values recommended by the Brazilian Medical Association. We assumed that all hospitalized cases of hepatitis A would also have outpatient care. Carbohydrate Thus, the costs of hospital treatment include the costs of hospitalization itself plus the costs of the outpatient care (medical visits + diagnostic tests). Since values for hospitalization in the private sector were not available, we assumed the same values of the public system, taken from SIH/SUS. As the Brazilian public health system is responsible for most transplantation, we adopted the average cost of hospitalization for liver transplantation in the SUS for both systems. Due to lack of data

for the costs of outpatient follow up post transplantation, primary data was collected in the Digestive System Organ Transplantation Service of the Hospital das Clinicas, the academic hospital of the University of Sao Paulo School of Medicine, in Sao Paulo, Brazil. The direct costs of transporting patients to receive care were included when the analysis was performed from the society perspective. Indirect costs refer to lost productivity due to hepatitis A by the patient or caregivers (we assumed the mother) of children aged <15 years. We used the human capital approach to calculate indirect costs. Lost productivity was calculated by multiplying the estimated number of working days lost by the national average wage for women. We assumed mean duration of 15 days for hepatitis A outpatients [23].