Compositions and methods of using these compositions that can include a targeting moiety and a therapeutic agent are described herein. These compositions can be used for diagnosing and/or treating flaviviridae-family viruses including Zika virus, dengue virus, and yellow fever.

Compositions and methods of using these compositions that can include a targeting moiety and a therapeutic agent are described herein. These compositions can be used for diagnosing and/or treating flaviviridaefamily viruses including Zika virus, dengue virus, and yellow fever.

The invention relates to the production and the characterization of new murine monoclonal antibodies that recognize the domain CTDL-2 (SEQ ID NO: 1) of the cell receptor DEC-205 of dendritic cells in chickens (Gallus gallus), pigs, (Sus scrofa) and humans (Homo sapiens). The invention also relates to the capacity of the new antibodies to direct and modulate the immune response at different levels in chickens (Gallus gallus) and pigs (Sus scrofa), as well as recognizing the receptor DEC-205 in dentritic cells and cell lines in humans. In addition, the invention is used to quickly produce a specific humoral immune response against Hemaglutinina H5 of the H5N2-type avian flu virus.

Described herein in aspects is a humanized anti-class II MHC antibody, wherein the humanized antibody binds to class II MHC with similar or increased affinity and/or specificity as compared with a non-humanized anti-MHC class II antibody that specifically binds to a shared epitope on most or all HLA-DR molecules. Related methods and uses are also described.