SARS-CoV-2

The primary purpose of this study is to evaluate the efficacy and safety of secutrelvir in symptomatic nonhospitalized adult and adolescent participants with COVID-19 who are at high risk for progression to severe disease.

The objective of this protocol is to use a case-control paradigm to compare the response to an intravenous administration of kisspeptin in individuals with and without post-covid-19 syndrome. The study subjects will receive a single bolus of kisspeptin.

This is a randomized, placebo-controlled study. Patients with long COVID will be randomized to receive dapagliflozin or placebo for 12 months.

The purpose of this clinical trial is to evaluate the safety, tolerability and efficacy of two doses (dose A and dose B) of Standardized Conditioned Medium Obtained by Coculture of M2-macrophages and fat-derived Mesenchymal Stromal Cells (PRS CK STORM) in the modulation of the cytokine storm in participants with acute respiratory infection caused by SARS-Cov-2, influenza A, influenza B and respiratory syncytial virus (RSV) in need for oxygen therapy. The main questions it aims to answer are: * Are both doses of PRS CK STORM (dose A and dose B) safe as an intravenous drug to modulate inflammatory processes, such as the cytokine storm in participants with SIRS caused by SARS-Cov-2, influenza A, influenza B and RSV? * Are both doses of PRS CK STORM (dose A and dose B) effective as an intravenous drug to modulate SIRS-associated cytokine storm caused by SARS-Cov-2, influenza A, influenza B and RSV compared to the control group? * What are the anti-inflammatory and pro-inflammatory cytokine profiles after treatment with two different doses of PRS CK STORM in participants with SIRS caused by SARS-Cov-2, influenza A, influenza B and RSV? Researchers will compare both doses of PRS CK STORM with the control group to test whether the anti-inflammatory action of PRS CK STORM is safe and effective in modulating the cytokine storm for the treatment of SIRS caused by SARS-Cov-2, influenza A, influenza B and RSV. In addition, the anti-inflammatory and pro-inflammatory cytokine profiles after treatment PRS CK STORM compared to placebo group in these participants will be also studied.

The purpose of this study is to investigate the immunogenicity and safety of mRNA COVID-19 variant-containing vaccine formulations against the vaccine-matched variants and newly emerged variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).

Infection with the SARS-CoV-2 coronavirus (COVID-19) has recently been identified as a pandemic due to the speed and global scale of its transmission. In Auvergne-Rhône-Alpes region (AURA), the epidemic began in February 2020 and the number of infected people is still important. Between 15 and 20% of COVID-19 patients develop an acute respiratory distress syndrome (ARDS) leading to their hospitalization in intensive care. Their clinical progression can be rapidly harmful with the development of severe ARDS associated with an increased risk of death. Preliminary data on the immune response of COVID-19 patients describe the induction of a moderate inflammatory response and the occurrence of major progressive lymphopenia over time associated with potential immunosuppression. Up to 50% of secondary infections are reported in deceased COVID-19 patients. However, no prospective study has exhaustively described the kinetics of the immune response of COVID-19 patients in intensive care. The precise description of the immune response over time in adult patients with a proven infection with the SARS-CoV-2 virus and the study of the relation between this response and the increased risk of organ failure (severe ARDS), death or nosocomial infection will allow us to better understand the pathophysiology of the immune response induced by COVID-19 in order to (i) identify new therapeutic strategies targeting the host response in patients in intensive care (ii) to develop biological markers to stratify patients for future clinical trials evaluating these immunoadjuvant treatments in COVID-19.

The 2019-2020 COVID-19 pandemic is the largest outbreak in recent history. It is not known how long after someone gets sick with COVID-19 and recovers that they can still infect other people. It is also not known how quickly people make antibodies against the virus, which help clear infection from the body. The investigators will enroll 300 people who had COVID-19 based on lab testing or confirmed exposure to participate. An additional 25 participants who have never tested positive for COVID and have not had the vaccine will be enrolled as negative controls. Participants will complete a survey at enrollment. The investigators will also collect blood, nose swab, saliva, stool, semen, and breast milk to test for the virus. The investigators will ask participants to complete a survey and give specimens up to 12 times over 24 months. This information will be used to study how long the virus can live in different parts of the body, antibody development, and post-infectious complications. The investigators hope that this information will allow medical and public health providers to make recommendations to better care for patients in the convalescent phase of COVID-19 infection.

The purpose of this study is to determine if immune responses differ when the mRNA COVID-19 vaccine is given through different delivery methods, including a needle-free injection system, or via intramuscular injection using needle and syringe

The project comprises two research lines. In the line 1, human monoclonal antibodies toward SARS-CoV-2 will be generate and characterized by in vitro functional tests. In the line 2, in vitro tests will be performed to evaluate the efficency of immune response mediated by antibodies direct to specific tumor molecules.

We propose to demonstrate that HIV-1 and SARS-CoV-2 are capable of targeting long-lived HSPC with self-renewal capacities. These progenitors, thus transformed into host cells, can give rise to a durable source of infected cells with an impact on hematopoiesis.

Human Endogenous Retroviruses (HERVs) are ancient sequences that became integrated into our DNA during evolutionary processes. The significance of their presence in DNA is still being studied, but HERVs appear to be involved in the regulation of the immune response. The gut microbiota is the set of microorganisms that physiologically colonize the gastrointestinal tract. Progressively increasing attention is being paid to the gut microbiota and its potential role in diseases of various kinds. In particular, it has recently been shown how abnormalities in the microbiota can affect immune regulation by determining the occurrence of certain diseases. One objective of the study is to evaluate whether there is an association between the expression of HERVs and clinical manifestations in pediatric age in patients with various diseases such as Kawasaki Disease, IgA Vasculitis/Schonlein-Henoch's Purpura, SARS-CoV-2 infection, or, finally, febrile virosis. Another objective of the study is to evaluate whether there is an association between the presence of particular types of bacteria in the gut microbiota and clinical manifestations in pediatric age in patients with Kawasaki Disease, IgA Vasculitis/Schonlein-Henoch purpura, SARS-CoV-2 infection or febrile virosis. The results from this may open new perspectives for both the care and therapeutic management of children with these diseases.

To evaluate the safety and efficacy of extended remdesivir infusion, targeting on immunocompromised individuals who had positive SARS-CoV-2 PCR despite an oral antiviral agent prescription.

The study is a multicenter, adaptive, randomized, double-blinded and placebo-controlled Phase II/III clinical trial. It will be conducted at selected investigational sites globally. The study is comprised of 2 parts.