Recombinant antibodies, kits comprising the same, and uses thereof

A method of determining whether a subject is infected by severe acute respiratory syndrome coronavirus (SARS-CoV) comprising:

• mixing a biological sample isolated from the subject with a first recombinant antibody and a second recombinant antibody, wherein
• the VL region of the first recombinant antibody comprises an amino acid sequence 100% identical to SEQ ID NO:
• 53, and the VH region of the first recombinant antibody comprises an amino acid sequence 100% identical to SEQ ID NO:
• 54;
• and
• the VL region of the second recombinant antibody comprises an amino acid sequence 100% identical to SEQ ID NO:
• 55, and the VH region of the second recombinant antibody comprises an amino acid sequence 100% identical to SEQ ID NO:
• 56;
• and
• detecting the presence or absence of a nucleocapsid protein of the SARS-CoV bound to the first or second recombinant antibody in the biological sample, wherein the presence of the nucleocapsid protein indicates that the subject is infected by the SARS-CoV.