The present disclosure relates generally to methods and chemical compositions for saliva sample processing and testing, and more specifically, rapid analysis of saliva biomarkers for detecting and monitoring disease.

The subject matter disclosed herein is generally directed to stratifying and treating coronavirus infections based on intrinsic immune states.

The application relates to certain new epitope peptides associated with coronavirus envolop protein and the use thereof. In particular, the application describes the antibodies and vaccines develped against these peptides, and the use thereof for the detection and treatment of coronaviral infection in human subjects.

Single-domain antibodies against SARS-CoV-2 are provided. The single-domain antibodies have been shown to have neutralizing activity against SARS-CoV-2 and can be used as a diagnostic and/or therapeutic in patients with coronavirus infection, such as COVID-19; and in diseases and disorders related to, or resulting from, coronavirus infection.

The present disclosure relates to a nanostructure for detecting viruses including an amphipathic polymer, and a diagnostic platform using the same, wherein the nanostructure is capable of specifically detecting viruses through silica-based nanoparticles with excellent stability and high dispersion and a biocompatible amphipathic polymer, such that it is possible to develop a diagnostic platform with high sensitivity through binding and agglomeration of the nanostructure and viruses and enable rapid and accurate diagnosis of a target virus.

The present disclosure concerns methods of detecting viral respiratory infections by analyzing biomarkers in a viral transport medium sample. In various embodiments the biomarkers are assessed by measuring mRNA or protein. In certain embodiments the biomarkers are nasal-virus induced molecules.

Described herein is an oral sampling device, as well as methods of making and using the oral sampling device. The oral sampling device is configured to be placed inside of a human mouth to capture an analyte(s) found in bodily fluid, such as saliva, produced within the mouth. An example oral sampling device includes a body, at least a portion of which is sized to fit inside of a mouth of a human, has an outer surface, and a recess(es) defined in the outer surface to capture the analyte(s) therein. In some examples, a material of the body within the recess was subjected to a surface treatment to promote the capture of the analyte(s). In some examples, the oral sampling device includes a flavored substance disposed on at least the portion of the body that is to be received inside of a human mouth.

The present invention relates to a particle collection for detecting a pathogen-neutralizing molecule. The present invention further relates to a composition comprising a particle collection. The present invention also relates to a method of detecting a pathogen-neutralizing molecule. Furthermore, the present invention relates to a kit for detecting a pathogen-neutralizing molecule. The present invention further relates to a point-of-care device, and to a use of a particle collection or a composition in a method of detecting a pathogen-neutralizing molecule.

The embodiments of the present disclosure provide an antibody or antigen-binding fragment against SARS-CoV-2 spike(S) protein, comprising: three complementarity determining regions (HCDRs) of a heavy chain variable region or one or more variants thereof, the heavy chain variable region set forth as SEQ ID NO. 30 or SEQ ID NO. 46, each of the one or more variants having at most two amino acid changes compared to the corresponding CDR; and three complementarity determining regions (LCDRs) of a light chain variable region or one or more variants thereof, the light chain variable region set forth as SEQ ID NO. 32 or SEQ ID NO. 48, each of the one or more variants having at most two amino acid changes compared to the corresponding CDR.

In some embodiments, a method includes applying an analyte to a rGO biosensor configured to bind to the analyte; applying a DC voltage to the rGO biosensor, wherein the DC voltage is +0.0008V to +0.005V for a negatively charged analyte; or ?0.005V to ?0.0008 for a positively charged analyte; and monitoring an electrical signal from the rGO biosensor for a response to the analyte.