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Our objective was to develop comprehensive national estimates of the total burden of herpes zoster (HZ) among US adults, including direct (ie, medical costs) and indirect (ie, productivity losses) costs, as well as its psychosocial impact (ie, quality of life losses). Using a patient-level microsimulation model, we projected health and economic outcomes among US adults aged 18 years and older using a 10-year time horizon. We conducted a comprehensive systematic literature review to generate parameter values and conducted simulation modeling to generate our outcomes, including numbers of cases of uncomplicated HZ, postherpetic neuralgia (PHN), and ocular complications, productivity losses, and losses in quality-adjusted life years (QALYs). We used a societal perspective for outcomes; the costing year was 2015. Projected outcomes for an unvaccinated population included 1.1 million HZ cases, 114,000 …