Rachel Wittenauer

Ms. Rachel Wittenauer

University of Washington
orcid

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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4 February 2022 in Antibiotics
Verified
Journal Article
Open access
PDF file
RKReuben Kiggundu
Reuben Kiggundu
Rachel WittenauerRachel Wittenauer
Rachel Wittenauer
JWJohn Paul Waswa
John Paul Waswa
HNHilma N. Nakambale
Hilma N. Nakambale
FKFreddy Kitutu
Freddy Kitutu
NKNiranjan Konduri
Niranjan Konduri
Standardized monitoring of antibiotic use underpins the effective implementation of antimicrobial stewardship interventions in combatting antimicrobial resistance (AMR). To date, few studies have assessed antibiotic use in hospitals in Uganda to identify gaps that require intervention. This study applied the World Health Organization’s standardized point prevalence survey methodology to assess antibiotic use in 13 public and private not-for-profit hospitals across the country. Data for 1077 patients and 1387 prescriptions were collected between December 2020 and April 2021 and analyzed to understand the characteristics of antibiotic use and the prevalence of the types of antibiotics to assess compliance with Uganda Clinical Guidelines; and classify antibiotics according to the WHO Access, Watch, and Reserve classification. This study found that 74% of patients were on one or more antibiotics. Compliance with Uganda Clinical Guidelines was low (30%); Watch-classified antibiotics were used to a high degree (44% of prescriptions), mainly driven by the wide use of ceftriaxone, which was the most frequently used antibiotic (37% of prescriptions). The results of this study identify key areas for the improvement of antimicrobial stewardship in Uganda and are important benchmarks for future evaluations.

31 March 2023 in BMC Medicine
Verified
Journal Article
Open access
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Rachel WittenauerRachel Wittenauer
Rachel Wittenauer
CPClint Pecenka
Clint Pecenka
RBRanju Baral
Ranju Baral
Background: Approximately 97% of global deaths due to RSV occur in low- and middle-income countries (LMICs). Until recently, the only licensed preventive intervention has been a shortacting monoclonal antibody (mAb), palivizumab (PVZ) that is expensive and intensive to administer, making it poorly suited for low-resource settings. Currently, new longer acting RSV mAbs and maternal vaccines are emerging from late-stage clinical development with promising clinical effectiveness. However, evidence of economic value and affordability must also be considered if these interventions are to be globally accessible. This systematic review’s objective was to summarise existing evidence on the cost-of-illness (COI) and cost-effectiveness of RSV prevention interventions in LMICs. Methods: We conducted a systematic literature review using the Embase, MEDLINE, and Global Index Medicus databases for publications between Jan 2000 and Jan 2022. Two categories of studies in LMICs were targeted: cost-of-illness (COI) of RSV episodes and cost-effectiveness analyses (CEA) of RSV preventive interventions including maternal vaccines and long-acting mAbs. Of the 491 articles reviewed, 19 met the inclusion criteria. Results: COI estimates varied widely: for severe RSV, the cost per episode ranged from $92 to $4114. CEA results also varied—e.g. evaluations of long-acting mAbs found ICERs from $462/DALY averted to $2971/DALY averted. Study assumptions of input parameters varied substantially and their results often had wide confidence intervals. Conclusions: RSV represents a substantial disease burden; however, evidence of economic burden is limited. Knowledge gaps remain regarding the economic value of new technologies specifically in LMICs. Further research is needed to understand the economic burden of childhood RSV in LMICs and reduce uncertainty about the relative value of anticipated RSV prevention interventions. Most CEA studies evaluated palivizumab with fewer analyses of interventions in development that may be more accessible for LMICs.

16 March 2024 in Health Affairs Scholar
Verified
Journal Article
Open access
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Rachel WittenauerRachel Wittenauer
Rachel Wittenauer
PSParth D Shah
Parth D Shah
JBJennifer L. Bacci
Jennifer L. Bacci
ASAndy Stergachis
Andy Stergachis
Pharmacies are important health care access points, but no national map currently exists of where pharmacy deserts are located. This cross-sectional study used pharmacy address data and Census Bureau surveys to define pharmacy deserts at the census tract level in all 50 US states and the District of Columbia. We also compared sociodemographic characteristics of pharmacy desert vs non-pharmacy desert communities. Nationally, 15.8 million (4.7%) of all people in the United States live in pharmacy deserts, spanning urban and rural settings in all 50 states. On average, communities that are pharmacy deserts have a higher proportion of people who have a high school education or less, have no health insurance, have low self-reported English ability, have an ambulatory disability, and identify as a racial or ethnic minority. While, on average, pharmacies are the most accessible health care setting in the United States, many people still do not have access to them. Further, the people living in pharmacy deserts are often marginalized groups who have historically faced structural barriers to health care. This study demonstrates a need to improve access to pharmacies and pharmacy services to advance health equity.

6 July 2023 in Vaccine
Verified
Journal Article
Open access
JFJessica A. Fleming
Jessica A. Fleming
RBRanju Baral
Ranju Baral
DHDeborah Higgins
Deborah Higgins
SKSadaf Khan
Sadaf Khan
SKSonali Kochhar
Sonali Kochhar
ESErin Sparrow
Erin Sparrow
Respiratory syncytial virus (RSV) is the predominant cause of acute lower respiratory infection (ALRI) in young children worldwide, yet no licensed RSV vaccine exists to help prevent the millions of illnesses and hospitalizations and tens of thousands of young lives taken each year. Monoclonal antibody (mAb) prophylaxis exists for prevention of RSV in a small subset of very high-risk infants and young children, but the only currently licensed product is impractical, requiring multiple doses and expensive for the low-income settings where the RSV disease burden is greatest. A robust candidate pipeline exists to one day prevent RSV disease in infant and pediatric populations, and it focuses on two promising passive immunization approaches appropriate for low-income contexts: maternal RSV vaccines and long-acting infant mAbs. Licensure of one or more candidates is feasible over the next one to three years and, depending on final product characteristics, current economic models suggest both approaches are likely to be cost-effective. Strong coordination between maternal and child health programs and the Expanded Program on Immunization will be needed for effective, efficient, and equitable delivery of either intervention. This 'Vaccine Value Profile' (VVP) for RSV is intended to provide a high-level, holistic assessment of the information and data that are currently available to inform the potential public health, economic and societal value of pipeline vaccines and vaccine-like products. This VVP was developed by a working group of subject matter experts from academia, non-profit organizations, public private partnerships and multi-lateral organizations, and in collaboration with stakeholders from the WHO headquarters. All contributors have extensive expertise on various elements of the RSV VVP and collectively aimed to identify current research and knowledge gaps. The VVP was developed using only existing and publicly available information.

12 January 2022 in Malaria Journal
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Journal Article
Open access
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Rachel WittenauerRachel Wittenauer
Rachel Wittenauer
SNSpike Nowak
Spike Nowak
NLNick Luter
Nick Luter
Background: Rapid diagnostic tests (RDTs) for malaria are a vital part of global malaria control. Over the past decade, RDT prices have declined, and quality has improved. However, the relationship between price and product quality and their larger implications on the market have yet to be characterized. This analysis used purchase data from the Global Fund together with product quality data from the World Health Organization (WHO) and Foundation for Innovative New Diagnostics (FIND) Malaria RDT Product Testing Programme to understand three unanswered questions: (1) Has the market share by quality of RDTs in the Global Fund’s procurement orders changed over time? (2) What is the relationship between unit price and RDT quality? (3) Has the market for RDTs financed by the Global Fund become more concentrated over time?Methods: Data from 10,075 procurement transactions in the Global Fund’s database, which includes year, product, volume, and price, was merged with product quality data from all eight rounds of the WHO-FIND programme, which evaluated 227 unique RDT products. To describe trends in market share by quality level of RDT, descriptive statistics were used to analyse trends in market share from 2009 to 2018. A generalized linear regression model was then applied to characterize the relationship between price and panel detection score (PDS), adjusting for order volume, year purchased, product type, and manufacturer. Third, a Herfindahl–Hirschman Index (HHI) score was calculated to characterize the degree of market concentration.Results: Lower-quality RDTs have lost market share between 2009 and 2018, as have the highest-quality RDTs. No statistically significant relationship between price per test and PDS was found when adjusting for order volume, product type, and year of purchase. The HHI was 3,570, indicating a highly concentrated market.Conclusions: Advancements in RDT affordability, quality, and access over the past decade risk stagnation if health of the RDT market as a whole is neglected. These results suggest that from 2009 to 2018, this market was highly concentrated and that quality was not a distinguishing feature between RDTs. This information adds to previous reports noting concerns about the long-term sustainability of this market. Further research is needed to understand the causes and implications of these trends.

17 October 2022 in Vaccine: X
Verified
Journal Article
Open access
Rachel WittenauerRachel Wittenauer
Rachel Wittenauer
PSParth D. Shah
Parth D. Shah
JBJennifer L. Bacci
Jennifer L. Bacci
ASAndy Stergachis
Andy Stergachis
• Pharmacy desert communities have worse access to key services like vaccination. • In Washington State, over 450,000 adults (8% of adults) live in pharmacy deserts. • Those living in pharmacy deserts were also associated with higher risk for COVID-19. • Several policy solutions are needed to address the access gap for pharmacy services.