Clinical Research Directory

COVID-19 Booster and IIV Schedule in Immunocompromised Hosts

The goal of this pragmatic embedded open-label, 2 x 2 factorial phase II randomized controlled trial is to evaluate strategies to improve COVID-19 booster and influenza vaccine immunogenicity in people living with immunocompromising conditions (PLIC). The main questions it aims to answer are: 1. Is co-administration of seasonal inactivated influenza vaccine (IIV) with the most up-to-date recommended COVID-19 booster dose non-inferior in inducing a 1-month peak protective humoral response against COVID-19, compared to a strategy of sequential administration of COVID-19 booster dose followed by seasonal IIV given one month later? 2. Is the administration of the most up-to-date recommended COVID-19 booster doses at 3-month intervals superior at maintaining a longer term protective humoral immune response, compared to booster doses administered at 6-month intervals? Researchers will compare (1) COVID-19 and Influenza vaccines administered at Day 0 + COVID-19 Booster at a 3-month interval, (2) COVID-19 vaccine administered at Day 0 and Influenza vaccine administered at Day 28 + COVID-19 Booster at a 3-month interval, (3) COVID-19 and Influenza vaccines administered at Day 0 + COVID-19 Booster at a 6-month interval, and (4) COVID-19 vaccine administered at Day 0 and Influenza vaccine administered at Day 28 + COVID-19 Booster at a 6-month interval to see if median neutralization capacity of patient sera is non-inferior in the co- vs. sequential administration arms at 1-month after the initial COVID-19 booster and superior in the 3-month interval arms vs. the 6-month interval arms at 12 months after the initial COVID-19 booster. These outcomes will also be compared at 2-months for question 1 and 6-months for question 2. People living with immunocompromising conditions who take part in the trial will have blood samples drawn to verify immune response, be monitored for changes in clinical events and therapies, and complete questionnaires to verify adverse effects, quality of life and economic impact.

Singapore SARS-CoV-2 Human Challenge Study

The goal of this study is to conduct a safe SARS-CoV-2 Delta variant human infection challenge in adult healthy volunteers. The main objectives are to: * Induce laboratory confirmed infection in up to 70% of participants * Confirm the safety profile as measured by the occurrence of adverse events (AEs) and serious adverse events (SAEs) from the day of viral challenge (Day 0) up to Day 28 follow-up. Participants will be given the GMP-produced Delta SARS-CoV-2 virus via intranasal drops using the optimized conditions established in the "Development of a SARS-CoV-2 Delta variant human infection challenge model" (COVHIC002) Human Challenge Study being conducted in the UK. A safe and well-tolerated human challenge model with the SARS-CoV-2 Delta variant will be established in Singapore. This model will be used to accelerate next-generation vaccine development and to determine the factors associated with altered clinical and virological outcomes; correlates of protection; and targets for the development of novel vaccines, therapeutics, and diagnostics.

Comparative Immunogenicity of Respiratory Virus Vaccines (CIRV2) Study

CIRV2 is a Phase IV randomized, open-label, trial of FDA-approved COVID-19 and/or influenza vaccines (no more than minimal risk) with longitudinal follow-up. In 2025 CIRV2 will compare immunogenicity and reactogenicity of the recombinant Novavax COVID-19 vaccine and the mRNA Pfizer-BioNTech COVID-19 vaccine.

A Study to Explore the Role of Gut Flora in COVID-19 Infection

This study seeks to determine whether the virus which causes COVID-19, SARS-CoV-2, is shed in the stools of patients who are infected.

Prospective Hospital Registry of Patients With Suspected or Confirmed Coronavirus Infection (COVID-19) and Community-acquired Pneumonia

Coronavirus-2019 disease (COVID-19) and community-acquired pneumonia are significant problems of modern medicine. Pneumonia is the most common severe complication of COVID-19. But at the same time, COVID-19 is not the only cause of community-acquired pneumonia. Moreover, pneumonia is only one of the numerous possible severe complications of COVID-19. Medical centers specialized for the hospital treatment of patients with severe COVID-19 and community-acquired pneumonia were organized in different regions of Russia during coronavirus pandemic-2020. The indications for hospitalization to one of these centers based in the National Medical and Surgical Center (NMSC) are: confirmed or suspected severe COVID-19 or community-acquired pneumonia. A prospective medical registry of such patients hospitalized to NMSC, is intended to analyze and compare their clinical and instrumental data, co-morbidity, treatment, short-term and long-term outcomes in real clinical practice. Stage 1. Hospital treatment in NMSC Duration of this stage: from the date of admission to the hospital up to the date of discharge from the hospital / or up to the date of death during the reference hospitalization. The date of admission to the hospital will be the date of enrollment to the study. Evaluation of electronic health record data using the Medical Information System (MIS). Assessment of the outcomes of the hospital phase (discharge from the hospital, death) and significant events (acute respiratory and pulmonary failure, requiring mechanical ventilation; cardiovascular events - myocardial infarction, cerebral stroke, acute heart failure, paroxysmal heart rhythm disturbances, bleedings, thrombosis of large vessels and thromboembolic complications). A survey of patients to clarify data on risk factors, somatic diseases, and drug therapy before hospitalization. COVID-19 was diagnosed when severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection was confirmed by Polymerase chain reaction (PCR). Pneumonia was confirmed according to computerized tomography (CT) data. Stage 2. Prospective outpatient follow-up for 24 months Duration of this stage: 24 months after discharge from the hospital This work will be delivered by investigators from the National Medical Research Center for Therapy and Preventive Medicine. Evaluation of long-term outcomes and events among residents of Moscow and the Moscow Region according to a patient survey (contact by phone for 30-60 days, 6 months, 12 and 24 months after discharge from the hospital) and medical records.

Evaluating the Impact of a Functional and Cognitive Strategy in Patients with Long Covid-19

This study aims to evaluate the impact of a functional and cognitive rehabilitation strategy compared to evidence-based informational messages, on functional capacity, cognitive abilities, quality of life, and disease progression in adults with chronic non-communicable diseases (NCDs) and Long Covid-19. Researchers will compare a structured rehabilitation program to informational support through evidence-based messages to determine if rehabilitation leads to better functional and cognitive outcomes in patients with Long Covid-19. Participants will be randomly assigned to one of two groups: 1. Functional and cognitive rehabilitation: Attending weekly in-person sessions for 8 weeks, including supervised physical and cognitive exercises. 2. Informational support: Receiving weekly evidence-based educational messages for 8 weeks. Participants will undergo assessments at baseline, post-intervention, and six months later, including a six-minute walk test, handgrip strength measurement, and questionnaires on disability, anxiety, depression, fatigue, dyspnea, cognitive function, and quality of life.

COMMUNITY - the COVID-19 Immunity Study

The principal aim of the COMMUNITY study is to investigate immune responses following SARS-CoV-2 infection and/or vaccination in healthcare workers and hospitalized COVID-19 patients. The study aims to enroll a total of 5,000 healthcare workers and 500 COVID-19 patients. All participants are enrolled at Danderyd Hospital in Stockholm, Sweden. Participants will be followed every four months with blood and mucosal sampling in addition to demographic and clinical data provided by the participants and from national registries. Primary outcome: \- Antibody responses in blood and mucosa following SARS-CoV-2 infection and/or vaccination Secondary outcomes: * Cellular immune responses following SARS-CoV-2 infection and/or vaccination * Antibody responses in blood and mucosa following following Influenza A/B infection and/or vaccination * Antibody responses in blood and mucosa following following RSV A/B infection Blood and mucosal samples are collected every 4 months and at tighter intervals in sub studies. PCR testing is conducted upon symptoms of respiratory infections and with regular intervals regardless of symptomatology in sub studies. Participants provide detailed demographic and clinical data through a smart phone application-based questionnaire. Data on infection and vaccination history is collected from national registries

Bio-reconfigurable Electronic Platform for Multiplex Detection of Viral Respiratory Pathogens

This project focuses on developing a cutting-edge electronic biosensor platform for highly sensitive and specific detection of target biomolecules, with initial applications targeting SARS-CoV-2 detection. The system operates on impedance measurement between microelectrodes, utilizing lock-in mode for unparalleled resolution (1 ppm). Enhanced signal detection is achieved via functionalized polystyrene microbeads that amplify impedance changes, building on prior success in Dengue virus antibody detection. Key innovations include Differential Impedance Sensing across multiple channels for real-time comparative analysis of various targets, and a biosensor chip modified with DMA-based functional polymers for optimal probe immobilization and target interaction. The biosensor integrates with a pre-existing microfluidic system and supports whole-virus detection using DNA-labelled antibodies against SARS-CoV-2 spike protein, coupled with complementary oligonucleotide-functionalized beads. This strategy is complemented by antigen-specific detection for practical applications such as point-of-care testing in pharmacies. The project includes a retrospective study analyzing anonymized respiratory and plasma samples from a COVID-19 biobank to validate the platform's sensitivity in detecting viral particles. These efforts aim to advance diagnostic technologies for respiratory infections with a focus on safety, scalability, and versatility.

A Multi-Site Clinical Evaluation of the LIAISON NES FLU A/B, RSV & COVID-19 Assay in Symptomatic Patients

The DiaSorin Molecular LIAISON® NES FLU A/B, RSV \& COVID-19 real-time polymerase chain reaction (RT-PCR) assay is intended for use on the DiaSorin LIAISON® NES instrument for the in-vitro qualitative detection and differentiation of nucleic acid from influenza A, influenza B, RSV and SARS-CoV-2 virus from dry nasal swabs (NS) from human patients with signs and symptoms during the acute phase of respiratory tract infection in conjunction with clinical and epidemiological risk factors. The LIAISON® NES FLU A/B, RSV \& COVID-19 assay is intended for use as an aid in the differential diagnosis of influenza A, influenza B, RSV and SARS-CoV-2 infection in a professional laboratory setting. Negative results do not preclude influenza A, influenza B, RSV or SARS-CoV-2, infection and should not be used as the sole basis for patient management decisions. The assay is not intended to detect the presence of the influenza C virus.