Clinical Research Directory

The Immunology and Safety of Maternal RSV Vaccination (ABRYSVO), Infant Nirsevimab (BEYFORTUS) Immunization, or Both Products

Respiratory Syncytial Virus (RSV) is the leading cause of lower respiratory tract infections (LRTIs) in infants and young children. It is also a leading cause of mortality in children \<5 years of age worldwide. Until recently, no Food and Drug Administration (FDA)-approved vaccines were available to prevent RSV infection. The only prophylactic product for RSV prevention recommended for infants was the monoclonal antibody palivizumab, but administration was limited to those with extreme prematurity, chronic lung disease, or hemodynamically significant congenital heart disease. However, in 2023, the FDA approved two products designed to prevent RSV lower respiratory tract disease (LRTD) in all infants: an active RSV vaccine based on the prefusion F protein (RSVpreF, ABRYSVO, Pfizer) administered during pregnancy, and a passive, long-acting monoclonal antibody (nirsevimab-alip \[henceforth referred to as nirsevimab\], BEYFORTUS, AstraZeneca) administered to infants at birth or at the start of their first RSV season. Both products were evaluated in Phase 3 pivotal clinical trials and have high efficacy in preventing LRTD caused by RSV in infants. Although there is no established correlate of protection against RSV, antibodies have been associated with protection across multiple studies. The clinical development plan for the products did not include comprehensive evaluations of the magnitude and durability of the immune response, nor were the two products tested in a single trial. This study is a prospective, randomized, open-label Phase 4 study with the primary objective of evaluating the magnitude and durability of RSV-specific neutralizing antibodies in infants through 12 months of life following either maternal RSV vaccination, infant nirsevimab administration, or both products combined.

A Phase III Study of Deuremidevir Hydrobromide for the Treatment of RSV Infection in Infants and Young Children

This is a randomized, double-blind, placebo-controlled, parallel-group trial conducted in infants and young children aged 1 to 36 months with RSV infection. A total of 498 subjects are expected to be enrolled and randomly assigned to the investigational product group or the placebo group in a 2:1 ratio; Administration will be based on the subject's weight, with a dose of 20 mg/kg three times daily for 5 consecutive days (15 doses).

Risk Factors and Severity of Bronchiolitis in Hospitalized Children at Assiut University Hospital

The purpose of this observational study is to identify the risk factors that make bronchiolitis more severe in infants and toddlers. Bronchiolitis is a common viral lung infection that causes inflammation and airway obstruction, often leading to breathing difficulties and hospitalization in young children. Researchers will observe approximately 65 children, aged 1 to 24 months, who are admitted to Assiut University Hospital for acute bronchiolitis. Because this is an observational study, participants will receive standard medical care, and no experimental treatments will be tested. During the hospital stay, researchers will collect information through parent questionnaires and standard medical records. The research team will gather data on: * Family, social, and environmental factors, such as infant feeding practices, premature birth, and exposure to passive smoking. * The child's clinical symptoms and overall severity of illness upon arrival at the hospital. * Routine test results and the types of supportive care the child needs, such as extra oxygen or feeding assistance. * The total length of the hospital stay and whether the child requires intensive care (ICU) admission. By identifying which factors are most closely linked to severe illness, the study aims to help doctors better predict the course of the disease early on, evaluate adherence to treatment guidelines, and ultimately reduce the health burden of bronchiolitis.

Remdesivir for the Treatment of Upper Respiratory Tract Infection Due to RSV in Immunocompromised Individuals

This phase II trial tests how well remdesivir works for treatment of respiratory syncytial virus (RSV) infection of the upper respiratory tract in patients receiving cellular or bispecific antibody therapy. Cellular or bispecific antibody therapies cause suppression of the immune system, making infections more frequent and reducing the body's ability to fight the infections. RSV infections are one of the most common respiratory infections in immunocompromised individuals and can cause significant pneumonia and even death. Remdesivir is in a class of medications called antivirals. It works by stopping viruses from spreading in the body.

Gut Microbiome and Immune Response in Severe RSV Infection in Vietnamese Infants

Respiratory syncytial virus (RSV) is a leading cause of severe lower respiratory tract infection in young children, and a substantial proportion of severe cases occur in previously healthy infants. The gut-lung axis suggests that gut microbiome composition may modulate respiratory immune responses. This prospective observational study in Vietnam will compare gut microbiome profiles and systemic immune cytokine responses between infants with severe RSV infection and those with mild RSV infection, aiming to identify microbiome-immune signatures associated with disease severity.

SPECIAL INVESTIGATION FOR ABRYSVO IN INDIVIDUALS AGED 60 YEARS OR OLDER

This post-marketing study is a multicenter cohort study in individuals aged 60 years or older vaccinated with Abrysvo (RSV vaccine）designed to confirm the safety in individuals aged 60 years or older under actual clinical practice in Japan.

Study of a Respiratory Syncytial Virus/Human Metapneumovirus/Parainfluenza Virus Type 3 Vaccine Candidate in Adults Aged 60 Years and Older

The purpose of this phase 1 study is to evaluate whether the vaccine is safe and can help the body to develop germ fighting agents called "antibodies" (immunogenicity) against the respiratory syncytial virus (RSV), human metapneumovirus (hMPV), and parainfluenza virus type 3 (PIV3). The study will use different doses of PIV3 only and different combinations of RSV/hMPV/PIV3 or RSV/hMPV or only RSV vaccine in adults aged 60 years and older.

RSV-Positive Children <5 Years Presenting to Pediatric Emergency Departments in Türkiye: TRUST-RSV

Respiratory syncytial virus (RSV) is a leading cause of acute lower respiratory tract infection in infants and young children and contributes substantially to pediatric emergency department (ED) visits and hospitalizations. In Türkiye, nationally representative prospective data describing the epidemiology, clinical spectrum, and resource utilization of RSV-positive children presenting to pediatric EDs remain limited. This multicenter prospective observational study aims to characterize demographic and clinical features of RSV-positive children under 5 years of age presenting to participating pediatric EDs across two consecutive RSV seasons, and to quantify key healthcare utilization outcomes, including ED observation duration, hospitalization, and intensive care unit (ICU) admission.

Genotype and Disease Burden of RSV in Older Vietnamese Adults (RSV: Respiratory Syncytial Virus )

This observational, prospective, multicenter study aims to estimate the proportion of RSV infection in adults aged 60 years and older hospitalized due to acute respiratory infections or exacerbation of cardiopulmonary disease.

Safety and Immunogenicity of the Recombinant Respiratory Syncytial Virus (RSV) Vaccine in Adults Aged 18 Years and Older

This phase 1 study in China will evaluate the safety and immunogenicity of the the Respiratory Syncytial Virus (RSV) Vaccine, LYB005 in adults aged 18 years and older.