Publications by authors named "Andrew Leidner"

Article Synopsis
  • In June 2021, ACIP recommended new vaccination strategies for adults 65 and older or 19-64 with high risk for pneumococcal disease, shifting from previous PPSV23 and PCV13 guidelines to using PCV20 alone or a series of PCV15 and PPSV23.
  • This study conducted a cost-effectiveness analysis comparing the new vaccine strategies against older recommendations to see their financial and health impacts.
  • Results indicated that using PCV20 or PCV15 with PPSV23 for the age-based group was cost-saving, while combining risk-based and age-based vaccinations with PCV20 alone also proved cost-saving. However, using PCV15 with PPSV23 increased quality
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  • Respiratory syncytial virus (RSV) leads to significant hospitalizations in infants in the US, prompting recommendations for nirsevimab to prevent RSV in all infants under 8 months and at-risk children up to 19 months during their RSV seasons.* -
  • A simulation study found that administering nirsevimab could potentially avoid over 107,000 outpatient visits and 14,000 hospitalizations annually if half of newborns receive it, costing approximately $153,517 per quality-adjusted life year (QALY) saved.* -
  • The analysis suggests nirsevimab is cost-effective, particularly for high-risk infants, though the cost-per-QALY can vary widely based on factors like hospitalization costs
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Background And Objectives: Respiratory syncytial virus (RSV) commonly causes hospitalization among US infants. A maternal vaccine preventing RSV in infants, RSV bivalent prefusion F maternal vaccine (RSVpreF), was approved by the US Food and Drug Administration and recommended by the Advisory Committee on Immunization Practices. Our objective was to evaluate the health benefits and cost-effectiveness of vaccinating pregnant persons in the United States using RSVpreF.

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  • On June 17, 2024, the FDA approved the 21-valent pneumococcal conjugate vaccine (PCV21) for adults 18 and older, introducing eight new serotypes not in other vaccines.
  • The ACIP recommends PCV21 for all adults 65 and older, and for those aged 19-64 with specific health risks if they haven't been previously vaccinated or their vaccination status is unknown.
  • ACIP recommends a single dose of PCV21 for adults 19 and older, while maintaining previous indications and guidelines for other pneumococcal vaccines.
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Respiratory syncytial virus (RSV) causes substantial morbidity and mortality in older adults. In May 2023, two subunit RSV vaccines (Arexvy [GSK] and Abrysvo [Pfizer]) received approval from the U.S.

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Since 1994, the U.S. Vaccines for Children (VFC) program has covered the cost of vaccines for children whose families might not otherwise be able to afford vaccines.

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Objective: The Federated States of Micronesia (FSM) experience periodic outbreaks of vaccine-preventable diseases. Our objective was to assess the cost-effectiveness of routine outreach and catch-up campaign strategies for increasing vaccination coverage for the measles, mumps, and rubella (MMR) vaccine among children aged 12 months through 6 years in Chuuk, FSM.

Methods: We used a cost-effectiveness model to assess 4 MMR vaccination strategies from a public health perspective: routine outreach conducted 4 times per year (quarterly routine outreach), routine outreach conducted 2 times per year (biannual routine outreach), catch-up campaigns conducted once per year (annual catch-up campaign), and catch-up campaigns conducted every 2 years with quarterly routine outreach in non-catch-up campaign years (status quo).

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Article Synopsis
  • * Before 2021, the main vaccines recommended were the 23-valent pneumonia vaccine (PPSV23) alone or in combination with the 13-valent pneumococcal conjugate vaccine (PCV13), which was later updated to include the new 15-valent (PCV15) and 20-valent (PCV20) vaccines.
  • * Current ACIP recommendations suggest using PCV20 alone or PCV15 with PPSV23 for adults 65 and older or those
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Background: Although use of the 13-valent pneumococcal conjugate vaccine (PCV13) among children has reduced incidence of pneumococcal disease, a considerable burden of disease remains. PCV15 is a new vaccine that contains pneumococcal serotypes 22F and 33F in addition to serotypes contained in PCV13. To inform deliberations by the Advisory Committee on Immunization Practices on recommendations for PCV15 use among U.

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Objectives: This study aimed to estimate the cost-effectiveness of the use of recombinant zoster vaccine (RZV) (Shingrix), which protects against herpes zoster (HZ), among immunocompromised adults aged 19 to 49 years, as a contribution to deliberations of the Advisory Committee on Immunization Practices.

Methods: Hematopoietic cell transplant (HCT) recipients experience a high incidence of HZ, and the efficacy of RZV in preventing HZ has been studied in clinical trials. The cost-effectiveness model calculated incremental cost-effectiveness ratios that compared vaccination with RZV with a no vaccination strategy among adults aged 19 to 49 years.

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The 13-valent pneumococcal conjugate vaccine (PCV13 [Prevnar 13, Wyeth Pharmaceuticals, Inc, a subsidiary of Pfizer, Inc]) and the 23-valent pneumococcal polysaccharide vaccine (PPSV23 [Merck Sharp & Dohme LLC]) have been recommended for U.S. children, and the recommendations vary by age group and risk group (1,2).

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The Advisory Committee on Immunization Practices (ACIP) recommends recombinant zoster vaccine (RZV) to prevent against herpes zoster (HZ) and related complications in immunocompetent adults ≥50 y and immunocompromised adults ≥19 y. In 2019, a statistical safety signal for Guillain-Barré syndrome (GBS) following RZV was identified using data from the Vaccine Safety Datalink (VSD). Subsequently, the U.

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Cost-effectiveness analyses (CEAs) are often prepared to quantify the expected economic value of potential vaccination strategies. Estimated outcomes and costs of vaccination strategies depend on numerous data inputs or assumptions, including estimates of vaccine efficacy and disease incidence in the absence of vaccination. Limitations in epidemiologic data can meaningfully affect both CEA estimates and the interpretation of those results by groups involved in vaccination policy decisions.

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In 2021, 20-valent pneumococcal conjugate vaccine (PCV) (PCV20) (Wyeth Pharmaceuticals LLC, a subsidiary of Pfizer Inc.) and 15-valent PCV (PCV15) (Merck Sharp & Dohme Corp.) were licensed by the Food and Drug Administration for adults aged ≥18 years, based on studies that compared antibody responses to PCV20 and PCV15 with those to 13-valent PCV (PCV13) (Wyeth Pharmaceuticals LLC, a subsidiary of Pfizer Inc.

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Zoster Vaccine Recombinant, Adjuvanted (Shingrix, GlaxoSmithKline [GSK]) is a 2-dose (0.5 mL each) subunit vaccine containing recombinant glycoprotein E in combination with adjuvant (AS01) that was licensed in the United States for prevention of herpes zoster for adults aged ≥50 years by the Food and Drug Administration (FDA) and recommended for immunocompetent adults aged ≥50 years by the Advisory Committee on Immunization Practices (ACIP) in 2017* (1). On July 23, 2021, the FDA expanded the indication for recombinant zoster vaccine (RZV) to include adults aged ≥18 years who are or will be at increased risk for herpes zoster because of immunodeficiency or immunosuppression caused by known disease or therapy (2).

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A two-dose series of the recombinant zoster vaccine (RZV, Shingrix) was licensed by the Food and Drug Administration in 2017 and recommended by the Advisory Committee on Immunization Practices in 2018 for adults in the United States age 50 years and older. Despite the health benefits of shingles vaccination, coverage has remained low, with financial barriers among healthcare providers identified as one potential factor. This study estimates the reimbursement levels for RZV among a large sample of privately insured individuals in the US from the 2018 IBM® MarketScan® Commercial Claims and Encounters database.

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An effective and widely used vaccine could reduce the burden of dengue virus (DENV) around the world. DENV is endemic in Puerto Rico, where the dengue vaccine CYD-TDV is currently under consideration as a control measure. CYD-TDV has demonstrated efficacy in clinical trials in vaccinees who had prior dengue virus infection.

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Article Synopsis
  • Ghana implemented the 13-valent pneumococcal conjugate vaccine (PCV13) in 2012, achieving over 88% vaccination coverage, but still faced outbreaks of pneumococcal meningitis.
  • A study surveyed patients at three hospitals to assess the economic impact of PCV13-type pneumonia and meningitis, finding significant costs incurred by families and healthcare systems.
  • The estimated annual economic burden reached $5.2 million, disproportionately affecting costs related to deaths from these diseases, particularly in older children and adults.
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Background: Estimates in the research literature on the health-related quality of life (QOL) associated with pneumococcal disease exhibit variation. It complicates the selection of estimates in modeling projects that evaluate the health impact and economic value of the prevention and treatment. This study reviewed the literature and developed pooled QOL estimates associated with pneumococcal disease states.

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Background: The Community Preventive Services Task Force (CPSTF) has recommended several interventions that have been demonstrated to be effective at increasing vaccination coverage.

Objective: Conduct a systematic review to examine the costs of interventions designed to increase vaccination coverage among children and adolescents in the United States.

Data Sources: PubMed, EconLit, Embase, and Cochrane.

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Background And Objectives: Between December 31, 2018, and April 26, 2019, 72 confirmed cases of measles were identified in Clark County. Our objective was to estimate the economic burden of the measles outbreak from a societal perspective, including public health response costs as well as direct medical costs and productivity losses of affected individuals.

Methods: To estimate costs related to this outbreak from the societal perspective, 3 types of costs were collected or estimated: public health response (labor, material, and contractor costs used to contain the outbreak), direct medical (third party or patient out-of-pocket treatment costs of infected individuals), and productivity losses (costs of lost productivity due to illness, home isolation, quarantine, or informal caregiving).

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During early August 2020, county-level incidence of coronavirus disease 2019 (COVID-19) generally decreased across the United States, compared with incidence earlier in the summer (1); however, among young adults aged 18-22 years, incidence increased (2). Increases in incidence among adults aged ≥60 years, who might be more susceptible to severe COVID-19-related illness, have followed increases in younger adults (aged 20-39 years) by an average of 8.7 days (3).

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Introduction: Improving the utilization of preventive care among adolescents is important for achieving individual-level and population-level health goals. The Healthcare Effectiveness Data and Information Set reports data submitted by managed care health plans, capturing a large number of individuals in the U.S.

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Poverty, crowded housing, and other community attributes associated with social vulnerability increase a community's risk for adverse health outcomes during and following a public health event (1). CDC uses standard criteria to identify U.S.

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Currently, the Advisory Committee on Immunization Practices recommends one-time tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis (Tdap) vaccination for all adults 19 years and older. This study is designed to evaluate the cost-effectiveness of Tdap vaccination for Tdap-eligible adults aged 19 through 85 in the United States. A cost-effectiveness model was developed to compute costs and health outcomes associated with pertussis among 100,000 Tdap-eligible persons of each age cohort.

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