The present invention relates a method for treatment of a pathogenic infection, in particular a pathogenic infection that can lead to an acute respiratory syndrome, such as coronavirus infection, using a composition comprising 9-Chloro-2,3-dimethyl (N,N-dimethylaminoethylamino-2-oxoethyl)-6H-indolo-[2,3-b]quinoxaline (rabeximod) or a pharmaceutically acceptable salt thereof. The present invention also concerns treatment of acute respiratory syndromes, such as ARDS.

Viral epidemic infections due to influenza, or coronaviruses, particularly influenza A and SARS-CoV-1 and -2 virus cause significant morbidity and mortality. The significant mutation rate of this group of viruses renders existing vaccines or antiviral drugs often useless, creating a need for broad acting, viral DNA or RNA sequence independent antiviral drugs. This invention describes the repurposing of methylene blue and riboflavin, two FDA approved drugs with an excellent safety profile. Using a virus neutralization assay of H1N1 Influenza A and SARS-CoV-2, the significant viricidal activity of both drugs at pharmacological dose and under physiological conditions is demonstrated. In vivo prophylactic and therapeutic use of the drugs for anti-viral application in an animal model is described.

Viral epidemic infections due to influenza, or coronaviruses, particularly influenza A and SARS-CoV-1 and -2 virus cause significant morbidity and mortality. The significant mutation rate of this group of viruses renders existing vaccines or antiviral drugs often useless, creating a need for broad acting, viral DNA or RNA sequence independent antiviral drugs. This invention describes the repurposing of methylene blue and riboflavin, two FDA approved drugs with an excellent safety profile. Using a virus neutralization assay of H1N1 Influenza A and SARS-CoV-2, the significant viricidal activity of both drugs at pharmacological dose and under physiological conditions is demonstrated. In vivo prophylactic and therapeutic use of the drugs for anti-viral application in an animal model is described.

Disclosed are compositions comprising an IL-2:anti-IL-2 antibody (Ab) complex (IL-2C) and methods of using said N compositions for the treatment of microbial infections, autoimmune diseases, autoinflammatory diseases, or cancers as well the treatment of inflammatory conditions or reduction in inflammation caused by said microbial infections, autoimmune diseases, autoinflammatory diseases, or cancers.

Disclosed are compositions comprising an IL-2:anti-IL-2 antibody (Ab) complex (IL-2C) and methods of using said N compositions for the treatment of microbial infections, autoimmune diseases, autoinflammatory diseases, or cancers as well the treatment of inflammatory conditions or reduction in inflammation caused by said microbial infections, autoimmune diseases, autoinflammatory diseases, or cancers.

Described herein are methods and compositions for treating a coronavirus infectious disease, e.g., COVID-19. Aspects of the invention relate to administering to a subject an agent that targets Notch4.

The present invention relates to antibodies and antigen-binding fragments thereof that bind to PD-1, and to methods of using such antibodies and antigen-binding fragments. For example, the present invention provides humanized anti-PD-1 antibodies and methods of use thereof.

The invention relates to immunogenic compositions comprising an antigen obtained or derived from an antigenic epitope of one or more pathogens that induces an immune response in a mammal, an antigen obtained or derived from bacterial cell wall or viral material that induces an immune response in a mammal such as LTA, PNG or LPS, and a T cell stimulating antigen such as CRM. Preferably the immunogenic composition is a vaccine that is effective against a pathogenic infection or can generate antibodies that can be collected that are protective against infection by the pathogen. In addition, the invention relates to vaccines comprising antigens and to method for treating and preventing an infection.

The invention relates to immunogenic compositions comprising an antigen obtained or derived from an antigenic epitope of one or more pathogens that induces an immune response in a mammal, an antigen obtained or derived from bacterial cell wall or viral material that induces an immune response in a mammal such as LTA, PNG or LPS, and a T cell stimulating antigen such as CRM. Preferably the immunogenic composition is a vaccine that is effective against a pathogenic infection or can generate antibodies that can be collected that are protective against infection by the pathogen. In addition, the invention relates to vaccines comprising antigens and to method for treating and preventing an infection.

The invention relates to an expression system comprising polynucleotides encoding proteins, wherein the expression system comprises a first polynucleotide encoding at least one protein, peptide or variant thereof, which induces a T cell response, and a second polynucleotide encoding at least one protein, peptide or variant thereof, which induces an anti-pathogenic B cell response. The invention further relates to protein mixtures encoded by the expression system and cells comprising the expression system or the protein mixture and pharmaceutical compositions comprising the expression system or the protein mixture.