The present invention relates to a monoclonal antibody or an antigen-binding fragment thereof, wherein the monoclonal antibody or the antigen-binding fragment thereof reacts with a structural protein of SARS-CoV-2 specifically, and the structural protein of SARS-CoV-2 is at least one selected from the group consisting of S-protein, N-protein, M-protein, and E-protein and a hapten, wherein the hapten that reacts with an antibody that reacts with a protein of SARS-CoV-2 specifically, and the protein of SARS-CoV-2 is at least one selected from the group consisting of S-protein, N-protein, M-protein, and E-protein.

The disclosure provides, in various embodiments, polypeptides (e.g., antibodies and antigen binding fragments thereof) that specifically bind to S2 domains of betacoronavirus Spike glycoproteins, such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Spike glycoproteins. The disclosure also provides, in various embodiments, fusion proteins comprising one or more of polypeptides, polynucleotides encoding polypeptides, vectors and host cells suitable for expressing polypeptides, and methods for treating viral infections (e.g., COVID-19).

The disclosure provides, in various embodiments, polypeptides (e.g., antibodies and antigen binding fragments thereof) that specifically bind to S2 domains of betacoronavirus Spike glycoproteins, such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Spike glycoproteins. The disclosure also provides, in various embodiments, fusion proteins comprising one or more of polypeptides, polynucleotides encoding polypeptides, vectors and host cells suitable for expressing polypeptides, and methods for treating viral infections (e.g., COVID-19).

The present invention relates to improved single domain antibodies that target SARS-CoV-2, the use of said single domain antibodies in treating and/or preventing coronavirus, as well as the use of said single domain antibodies in the detection and diagnosis of coronavirus using various methods, assays and kits.

The present invention relates to improved single domain antibodies that target SARS-CoV-2, multivalent polypeptides and fusion proteins comprising the single domain antibodies. The present invention also provides coronavirus binding molecules that bind two different epitopes on the receptor binding domain of a spike protein of a coronavirus. The coronavirus binding molecules are based on joining two antigen binding molecules together via a linker. The present invention provides the use of said single domain antibodies, multivalent polypeptides, fusion proteins and coronavirus binding molecules in treating and/or preventing coronavirus, as well as the use of said single domain antibodies, multivalent polypeptides, fusion proteins and coronavirus binding molecules in the detection and diagnosis of coronavirus using various methods, assays and kits.

The present disclosure relates to methods for reducing host cell protein content in a protein preparation recombinantly produced in a host cell in the manufacturing process of proteins intended for administration to a patient.

The present patent consists of an engineered multimeric protein complex as antibody substitute composed of human proteins, with an m-fold symmetry, with each m-fold element containing a modified monomeric protein derived from a symmetric human multimeric protein complex fused to a module containing n fused, modified human beta solenoid proteins (mBSP), and that fused to a human derived pathogen binding domain (PBD), as well as a separate antibody substitute composed of P human PBD complexes. The invention may find application in prophylactic and therapeutic treatments for viral infections, especially for COVID19 by neutralizing the SARS-CoV-2 virus.

Provided are antibodies that specifically bind a Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) antigen. Nucleic acids that encode one or both of the variable chain polypeptides of an antibody of the present disclosure are also provided, as are cells that include such nucleic acids. Also provided are compositions that include the antibodies of the present disclosure, including in some instances, pharmaceutical compositions. Methods of making and using the antibodies of the present disclosure are also provided. In certain aspects, provided are methods that include administering to an individual in need thereof, e.g., an individual having or suspected of having a SARS-CoV-2 infection, a therapeutically effective amount of an antibody of the present disclosure.

Antibodies against coronavirus receptor binding domain (SARS-CoV-2) are provided. The antibodies have neutralizing activity against coronaviruses and their activity. The anti-coronavirus receptor binding domain antibodies may be used in therapeutic treatment in patients with coronavirus infections and/or conditions associated with coronavirus infection.

An antibody against a novel coronavirus, and a reagent and a kit for detecting the novel coronavirus, which relate to the technical field of antibodies. The antibody against the novel coronavirus includes a heavy chain complementarity determinant region and a light chain complementarity determinant region. The antibody has good affinity for N protein of the novel coronavirus, and has good sensitivity and specificity for detecting the novel coronavirus. Antibody options are provided for detection of the novel coronavirus.