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The COVID-19 pandemic has highlighted and exacerbated long-standing inequities in the social determinants of health (1-3). Ensuring equitable access to effective COVID-19 therapies is essential to reducing health disparities. Molnupiravir (Lagevrio) and nirmatrelvir/ritonavir (Paxlovid) are oral antiviral agents effective at preventing hospitalization and death in patients with mild to moderate COVID-19 who are at high risk* for progression to severe COVID-19 when initiated within 5 days of symptom onset. These medications received Emergency Use Authorization from the Food and Drug Administration (FDA) in December 2021 and were made available at no cost to recipients through the U.S. Department of Health and Human Services (HHS) on December 23, 2021. Beginning March 7, 2022, a series of strategies was implemented to expand COVID-19 oral antiviral access, including the launch of the Test to Treat initiative. Data from December 23, 2021-May 21, 2022, were analyzed to describe oral antiviral prescription dispensing overall and by week, stratified by zip code social vulnerability. Zip codes represented areas classified as low, medium, or high social vulnerability; approximately 20% of U.S. residents live in low-, 31% in medium-, and 49% in high-social vulnerability zip codes. During December 23, 2021-May 21, 2022, a total of 1,076,762 oral antiviral prescriptions were dispensed (Lagevrio = 248,838; Paxlovid = 827,924). Most (70.3%) oral antivirals were dispensed during March 7-May 21, 2022. During March 6, 2022-May 21, 2022, the number of oral antivirals dispensed per 100,000 population increased from 3.3 to 77.4 in low-, from 4.5 to 70.0 in medium-, and from 7.8 to 35.7 in high-vulnerability zip codes. The number of oral antivirals dispensed rose substantially during the overall study period, coincident with the onset of initiatives to increase access. However, by the end of the study period, dispensing rates in high-vulnerability zip codes were approximately one half the rates in medium- and low-vulnerability zip codes. Additional public health, regulatory, and policy efforts might help decrease barriers to oral antiviral access, particularly in communities with high social vulnerability.
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http://dx.doi.org/10.15585/mmwr.mm7125e1 | DOI Listing |
Infect Drug Resist
August 2025
Department of Dermatology, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, 200443, People's Republic of China.
Purpose: Herpes zoster poses severe complications in elderly immunocompromised patients, particularly those with altered drug metabolism and renal impairment, impacting quality of life.
Patients And Methods: To evaluate brivudine's efficacy and safety in such cases, we conducted a retrospective case series at Shanghai Skin Disease Hospital, analyzing four Chinese patients (aged 64-84 years) with complex herpes zoster, including systemic lupus erythematosus, diabetes nephropathy, multiple comorbidities, and trigeminal nerve involvement. Selected for their immunocompromised status and prior antiviral failure or renal concerns, patients received oral brivudine (125 mg once daily) with or without intravenous acyclovir, with outcomes assessed via clinical examination, pain scores, and laboratory monitoring over 7-14 days.
Bioorg Chem
August 2025
College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea. Electronic address:
Nucleoside analogs have served as the cornerstone of antiviral therapy by acting as antimetabolites that disrupt viral DNA or RNA synthesis, thereby effectively inhibiting viral replication. Despite their clinical success, many nucleoside-based antivirals suffer from intrinsic limitations such as poor lipophilicity, low membrane permeability, and rapid metabolic degradation, all of which compromise oral bioavailability and therapeutic efficacy. To address these challenges, lipid conjugation has emerged as a promising prodrug strategy that enhances pharmacokinetic properties, improves cellular uptake, and enables targeted delivery.
View Article and Find Full Text PDFAntiviral Res
September 2025
Innovative Molecules GmbH, Lipowsky Str. 10, 81373 Munich, Germany. Electronic address:
The high incidence and prevalence of herpes infections pose a significant health burden worldwide. Herpes simplex virus infections are the cause of herpes labialis, genital herpes or herpes keratitis and in rare cases life-threatening herpes encephalitis, meningitis or disseminated disease. After primary infection herpes simplex viruses (HSVes) establish latency in the trigeminal and sacral ganglia and at least 30% of patients experience clinically manifestant recurrences for life.
View Article and Find Full Text PDFJ Virol
September 2025
Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA.
Bourbon virus (BRBV) is an emerging tick-borne virus that can cause severe and fatal disease in humans. BRBV is vectored via the tick, which is widely distributed throughout the central, eastern, and southern United States. Serosurveillance studies in Missouri and North Carolina identified BRBV-neutralizing antibodies in approximately 0.
View Article and Find Full Text PDFAust J Gen Pract
September 2025
MBBS, FRACP, DTM@H, Deputy Chief Health Officer, Victorian Department of Health, Melbourne, Vic.
Background And Objectives: Oral antiviral therapies are recommended for treatment of COVID-19 in people vulnerable to severe outcomes. This study examined COVID-19 antiviral dispensation and incidence of severe outcomes among eligible Victorians by socioeconomic status and cultural and linguistic diversity.
Method: A retrospective analysis was conducted using linked population data.