The purpose of the study is to learn about: - how PF-07817883 is processed in the body of adult participants. - the safety of PF-07817883. These participants will have different levels of kidney function loss: - moderate - severe - none or healthy Participants with moderate, severe or no loss of kidney function may be taken into one of 3 groups. This study is seeking for participants who: - are male or female of 18 to 90 years of age. - have different levels of damage to kidney function or for one of the groups, no damage - are willing to follow the requirements of the study including stay at clinic for 5 nights and 6 days. About, 8 participants may be selected in groups 2 and 3. In group 1, around 8 to 12 participants may be selected. If participants agree to take part in the study, it may take up to 4 weeks to complete all the tests to confirm if they are fit to be in the study. If they seem to be fit for the study, participants will be admitted to a clinic research unit (CRU) at least 8 hours before dosing. On Day 1, participants will receive a single amount of study medicine (Day 1). A series of blood samples will be collected before and after giving medicines. Participants will be discharged from the CRU on Day 5. A follow-up phone call (or CRU visit, if needed), will occur 28-35 days after taking the medicine. The whole study will last for a minimum of 5 weeks and a maximum of 10 weeks.

Type: Interventional

Start Date: Sep 2024

open study

This platform protocol is designed to be flexible so that it is suitable for a wide range of settings within health care systems, for remote settings, and in community settings where it can be integrated into COVID-19 programs and subsequent treatment plans. This protocol is a prospective, multi-center, multi-arm, randomized, controlled platform trial evaluating potential interventions for PASC-mediated cognitive dysfunction. The hypothesis is that PASC-associated dysfunction in cognitive domains, such as executive function and attention, may be improved by interventions that selectively focus on enhancing those domains. This design seeks to evaluate each intervention relative to the Active Comparator. The BrainHQ (alone) arm is important because the intervention is commercially available, accessible, relatively inexpensive, and does not require trained personnel to administer. BrainHQ has been also been proven effective in other studies of cognitive dysfunction such as studies in aging, mild cognitive impairment, traumatic brain injury, among others. The BrainHQ + PASC CoRE arm and the BrainHQ + tDCS arms are suspected to provide cognitive improvements beyond BrainHQ alone through different mechanisms. Both PASC CoRE and tDCS have extensive prior use and have demonstrated utility in improving aspects of cognitive function in other clinical settings..

Type: Interventional

Start Date: Sep 2023

open study

This study will assess low-dose lithium's effects on several different symptoms experienced by long COVID patients.

Type: Interventional

Start Date: Nov 2022

open study

Multi-system Inflammatory Syndrome in Children (MIS-C) is a new condition related to COVID-19, the study investigators are still learning about its causes, effects, and long-term impact. "Long-Term Outcomes after the Multisystem Inflammatory Syndrome In Children", the Coronavirus MUSIC Study, is a research study funded by NIH and the National Heart, Lung, and Blood Institute. The study investigators hope to enroll at least 900 young people with MIS-C at children's medical centers in the U.S. and Canada. This research study will help us learn more about MIS-C and its effects on the long-term health of children.

Type: Observational

Start Date: Sep 2020

open study

This study will investigate the efficacy of oral gabapentin in olfactory improvement following Covid-19- associated olfactory dysfunction. This is a randomized, double-blinded, placebo-controlled trial.

Type: Interventional

Start Date: Jan 2022

open study

The adaptive immune response, consisting of antiviral T and B cells, is critical for providing protection against viruses such as SARS-CoV-2, both during an active infection and later following a subsequent exposure. They can both also potentially contribute to pathogenesis if they are overstimulated. Despite these advances in knowledge, there are still significant gaps in understanding of what constitutes a protective or immunopathologic immune response and its durability. Significant knowledge gaps also remain pertaining to the early recognition of COVID patients with increased risk of clinical deterioration who require continued hospitalization and the use of more intensive treatments designed to improve outcomes. Data from non-COVID patients with MI show that platelet surface expression of FcγRIIa, the low-affinity receptor for the Fc fragment of immunoglobulin (Ig) G, identifies patients at high and low risk of subsequent cardiovascular events. Platelet expression of FcγRIIa is increased by interferon γ20 that is significantly elevated in severe COVID-19 infections. The high prevalence of arterial thrombosis among COVID-19 patients and the central role of thrombosis in respiratory failure support the hypothesis that elevated platelet expression of FcγRIIa will identify COVID patients at increased risk of thrombotic complications and clinical deterioration. In addition to the potential role of platelet activation in thrombosis associated with COIVD-19, the endothelium may also play a significant role. The investigators hypothesize that elevated EMPs in plasma will identify patients at high risk of thrombosis and clinical deterioration. To begin to address the knowledge gaps above and obtain preliminary data for future large grant submission, the investigators propose a small, prospective, single-center cohort study that will enroll patients hospitalized for COVID-19 infection and exhibiting a range of disease severity. Biosamples will be obtained and used to study T and B cells, antibody repertoire, and durability of protective immunity, and also to quantify platelet expression of FcγRIIa and circulating EMPs, as described in the protocol.

Type: Observational

Start Date: Feb 2021

open study

This is a single-center, randomized double blind placebo controlled trial to evaluate the efficacy and safety of novel PAI-1 inhibitor (TM5614) for high-risk patients hospitalized with severe COVID-19 at Northwestern Memorial Hospital. The patients will be randomized in a 1:1 ratio to receive standard of care plus TM5614 or standard of care plus placebo.

Type: Interventional

Start Date: Jan 2021

open study

The purpose of this study is to explore the efficacy of Aggrenox in patients with SARS-CoV-2 infection with symptoms consistent with COVID-19. An anticipated total of 132 participants will be randomly divided almost equally into 2 groups: one group will receive Dipyridamole ER 200mg/ Aspirin 25mg orally/enterally along with the standard of care and the other group with receive the standard of care only but no Dipyridamole ER 200mg/ Aspirin 25mg. Participants will be screened, enrolled, receive treatment, and followed for 28 days. The clinical and laboratory outcomes of all the participants enrolled in the study will be evaluated at the end of the study to explore if there is any difference in the outcomes between 2 groups.

Type: Interventional

Start Date: Oct 2020

open study

The goal of this clinical study is to learn more about the safety and tolerability of obeldesivir (ODV) in children and adolescents with coronavirus disease 2019 (COVID-19). The primary objectives are to evaluate the plasma pharmacokinetics (PK), safety and tolerability of ODV in pediatric participants with COVID-19.

Type: Interventional

Start Date: Dec 2023

open study

Prevention of COVID-19 caused by SARS-CoV-2.

Type: Interventional

Start Date: Aug 2022

open study

The purpose of this study is to evaluate the positivity rate of respiratory syncytial virus (RSV), influenza virus and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in high-risk participants presenting with acute respiratory infections (ARIs) in outpatient settings during the influenza/RSV season and to evaluate the association between lower respiratory tract disease (LRTD) and ARI-related hospitalization in participants positive for RSV.

Type: Interventional

Start Date: Dec 2021

open study

The purpose of this study is to assess the antibody response to COVID-19 vaccination in a cohort of patients with sickle cell disease (SCD) and to assess vaccine and SCD related complications around the time of vaccination.

Type: Observational

Start Date: Dec 2021

open study

To reach herd immunity for COVID-19, experts estimate that 70% of the population will need to be vaccinated. However, vaccination rates have begun to slow down in the United States. The investigators will partner with Philadelphia to launch a COVID-19 vaccination sweepstakes, in which residents will be eligible to win if they have received at least one dose of the COVID-19 vaccine prior to a given drawing. Drawings will be held every two weeks; multiple prizes of various sizes will be awarded in each drawing. Half of the prizes in each size category in each drawing will be awarded to residents of a zip code that is randomly selected from a pre-defined list of under-vaccinated zip codes (this zip code will be announced at the start of each 2-week drawing period), the other half will be awarded to residents outside of that selected zip code. The investigators will analyze vaccination rates in Philadelphia as compared with neighboring regions before, during, and after the specified time period, as well as analyze vaccination rates in the three selected zip codes compared to the other zip codes that could have been targeted (the residual set of under-vaccinated zip codes) to determine the effectiveness of the sweepstakes at encouraging vaccinations.

Type: Interventional

Start Date: Jun 2021

open study

An adaptive platform trial to compare effectiveness of different care models to prevent readmissions for patients hospitalized with sepsis or lower respiratory tract infection. The primary outcome is number of days spent at home within 90 days after hospital discharge.

Type: Interventional

Start Date: Mar 2021

open study

Best Practices to Prevent COVID-19 Illness in Staff and People With Serious Mental Illness and Developmental Disabilities in Congregate Living Settings is a research study aimed at developing, implementing, and evaluating a package of interventions specifically designed to reduce COVID-19 and other infectious-disease incidence, hospitalizations, and mortality among staff and adults with Serious Mental Illness and Intellectual and Developmental Disabilities in congregate-living settings.

Type: Interventional

Start Date: Nov 2020

open study

The main objective of the study is to evaluate the safety of the elasomeran/davesomeran and andusomeran vaccines as used in routine clinical practice.

Type: Observational

Start Date: Apr 2023

open study

This T1 proof of concept trial is designed to test the Narrative Intervention for Long COVID-19 intervention.

Type: Interventional

Start Date: Oct 2022

open study

This is a Phase 2/3, randomized, double-blind study to evaluate the safety and immunogenicity of different booster dose levels of the monovalent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) recombinant (r) spike (S) protein nanoparticle (SARS-CoV-2 rS) vaccines with Matrix-M™ adjuvant (NVX-CoV2373 [prototype Wuhan vaccine with Matrix-M adjuvant] or NVX-CoV2601 [Omicron XBB.1.5 subvariant vaccine with Matrix-M adjuvant]).

Type: Interventional

Start Date: Oct 2023

open study

The purpose of this study is to evaluate the safety and immunogenicity of ascending dose levels of VXCO-100 in healthy adults.

Type: Interventional

Start Date: May 2023

open study

The purpose of this study is to assess the efficacy and safety of Ampligen® administered twice weekly by intravenous (IV) infusions in subjects experiencing the Post-COVID Condition of fatigue.

Type: Interventional

Start Date: Jun 2023

open study

This study is a cooperative investigation funded by the NIH. The project is a collaboration among three major NIH Clinical Translational Science Awardees: 1) UCI (lead site with its affiliate CHOC), 2) Northwestern University (with its affiliate Lurie Children's Hospital), and 3) USC (with its affiliate Children's Hospital of Los Angeles). There is an increasing number of children who, through medical advances, now survive diseases and conditions that were once fatal, but which remain chronic and debilitating. A major challenge to improve both the immediate and long term care and health of such children has been the gap in our understanding of how to assess the biological effects of exercise. Like otherwise healthy children, children with chronic diseases and disabilities want to be physically active. The challenge is to determine what constitutes safe and beneficial level of physical activity when the underlying disease or condition [e.g., cystic fibrosis (CF) or sickle cell disease (SCD)] imposes physiological constraints on exercise that are not present in otherwise healthy children. Current exercise testing protocols were based on studies of athletes and high performing healthy individuals and were designed to test limits of performance at very high-intensity, unphysiological, maximal effort. These approaches are not optimal for children and adolescents with disease and disability. This project (REACH-Revamping Exercise Assessment in Child Health) is designed to address this gap. Cohorts of children will be identified with two major genetic diseases (CF and SCD) and measure exercise responses annually as they progress from early puberty to mid or late puberty over a 3-4year period. In addition, in the light of the pandemic, a group of children will be added who were affected by SARS-CoV-2 and investigate their responses to exercise. SARS-CoV-2 has similar long-term symptoms than CF and SCD have. Novel approaches to assessing physiological responses to exercise using advanced data analytics will be examined in relation to metrics of habitual physical activity, circulating biomarkers of inflammation and growth, leukocyte gene expression, and the impact of the underlying CF, SCD or SARS-CoV-2 condition. The data from this study will help to develop a toolkit of innovative metrics for exercise testing that will be made available to the research and clinical community.

Type: Interventional

Start Date: Nov 2020

open study

This trial is composed of a randomized, double-blind, active controlled component (Part A) and an open-label, single-arm component (Part B) conducted in parallel. Part A is designed to compare vaccination with a single 100 µg dose of ABNCoV2 to a single 30 µg adult booster dose of Comirnaty (active control) in adult subjects who either previously completed primary vaccination (Cohort 1) or have already received 1 booster dose (Cohort 2) of SARS-CoV-2 locally authorized vaccine(s), and whose last locally authorized SARS-CoV-2 vaccination was at least 3 months prior to the screening visit. Subjects will be randomized in a 1:1 ratio to receive either ABNCoV2 or Comirnaty. Part B is designed to collect ABNCoV2 safety and tolerability data from a larger population of adult subjects, as well as additional immunogenicity data from a subset. Part B involves vaccination with the same single 100 µg dose of ABNCoV2 in the same population of adult subjects as the randomized component, and subjects will similarly be enrolled into 2 cohorts according to whether they have completed primary vaccination only or primary plus booster vaccination.

Type: Interventional

Start Date: Aug 2022

open study

EPOC is designed to examine the feasibility of conducting two point-of-care (POC) tests the LumiraDx SARS-CoV-2 Antibody Test and the RightSign COVID-19 IgG/IgM Rapid Test for SARS-CoV-2 antibodies and compare the reproducibility of these tests to tests run at a central laboratory on specimens obtained from the same study participants at the same time.

Type: Observational

Start Date: Apr 2022

open study

The overarching goal of the Master Protocol is to find effective strategies for inpatient management of patients with COVID-19. Therapeutic goals for patients hospitalized for COVID-19 include hastening recovery and preventing progression to critical illness, multiorgan failure, or death. Our objective is to determine whether modulating the host tissue response improves clinical outcomes among patients with COVID-19. The primary analysis will include data from NCT05593770.

Type: Interventional

Start Date: Jul 2021

open study

The purpose of this prospective, Phase 2, multicenter, blinded, randomized placebo controlled study is to demonstrate that early treatment with mavrilimumab prevents progression of respiratory failure in patients with severe COVID-19 pneumonia and clinical and biological features of hyper-inflammation.

Type: Interventional

Start Date: May 2020

open study