Abstract
BackgroundAlthough live-attenuated varicella-zoster virus (VZV) vaccines have been proven to be safe and effective in preventing varicella and real-word evidence shows routine childhood immunization programs are effective in dramatically reducing varicella associated morbidity and mortality, varicella vaccine is not included in the National Immunization Program (NIP) in Hungary. The purpose of this study was to evaluate the clinical and economic burden associated with varicella in Hungary.MethodsThis was a multicenter, retrospective, chart review study of patients aged 1–12 years with a primary varicella diagnosis between 2011 and 2015. Healthcare resource utilization (HCRU) associated with varicella, unit costs, and work loss were used to estimate direct and indirect costs. All costs are presented in 2015 HUF / Euros (€).Results156 children with varicella were included (75 outpatients, 81 inpatients), with a mean age of 4.4 (SD: 2.0) and 3.7 (SD: 2.1) years, respectively. One or more complications were reported by 12.0% of outpatients and 92.6% of inpatients, the most common being dehydration, skin and soft tissue infections, pneumonia, keratoconjunctivitis, and cerebellitis. HCRU estimates included use of over-the-counter (OTC) medications (96.0% outpatients, 53.1% inpatients), prescription medications (9.3% outpatients, 70.4% inpatients), tests/procedures (4.0% outpatients, 97.5% inpatients), and consultation with allied health professionals (2.7% outpatients, 30.9% inpatients). The average duration of hospital stay (inpatients) was 3.6 (95% CI: 3.2, 4.1) days. The total combined direct and indirect cost per varicella case was 228,146.7 Hungarian Forint (HUF)/€ 736.0 for inpatients and 49,790.6 HUF/€ 106.6 for outpatients. The overall annual cost of varicella in Hungary for children aged <15 years in 2015 was estimated at 1,903,332,524.3 HUF/ € 6,139,980.4.ConclusionVaricella is associated with substantial clinical burden in Hungary, resulting in the utilization of a significant amount of healthcare resources. These results support the need for routine vaccination of all healthy children to reduce the varicella-associated disease burden.
Highlights
Live-attenuated varicella-zoster virus (VZV) vaccines have been proven to be safe and effective in preventing varicella and real-word evidence shows routine childhood immunization programs are effective in dramatically reducing varicella associated morbidity and mortality, varicella vaccine is not included in the National Immunization Program (NIP) in Hungary
In Hungary, recommended by National Center for Epidemiology (NCE) the varicella vaccine is optional for children and not covered or reimbursed by the Ministry of Human Capacities [24, 25], The primary objective of this study was to describe the burden of illness associated with varicella in Hungary, including morbidity, healthcare resource utilization (HCRU), and the associated cost among children 1– 12 years of age, diagnosed with varicella, who sought either outpatient or inpatient care between 2011 and 2015
Of the patients experiencing complications, 22.2% of outpatients experienced more than one complication in contrast to 41.3% of inpatients
Summary
Live-attenuated varicella-zoster virus (VZV) vaccines have been proven to be safe and effective in preventing varicella and real-word evidence shows routine childhood immunization programs are effective in dramatically reducing varicella associated morbidity and mortality, varicella vaccine is not included in the National Immunization Program (NIP) in Hungary. In Hungary, the incidence of varicella was reported by the Hungarian National Center for Epidemiology (NCE) to be 3.96 cases per 1000 persons in 2010, for a total of 39,602 cases [9], and reported a similar number of varicella cases (n = 40,853) for 2015 [10]. Both numbers are most likely an underestimate of the true number of varicella cases given that many mild cases are not reported or seen by medical personnel. No data exist on the age-specific seroprevalence of varicella antibodies in Hungary, data from bordering Slovakia indicates that
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