The present disclosure provides recombinantly manufactured fusion proteins comprising a SARS-CoV-2 Receptor Binding Domain (SARS-CoV-2-RBD) fragment or an analog thereof linked to a human Fc fragment for use in relation to the 2019 Novel Coronavirus (COVID-19). Embodiments include the administration of the fusion proteins to patients that have recovered from COVID-19 as a booster vaccination, to antibody naïve patients to produce antibodies to the SARS-CoV-2 virus to enable the patients to become convalescent plasma donors, to patients who have been infected by the SARS-CoV-2 virus and have contracted COVID-19 in order to limit the scope of the infection and ameliorate the disease, and as a prophylactic COVID-19 vaccine. Exemplary Fc fusion proteins and pharmaceutical formulations of exemplary Fc fusion proteins are provided, in addition to methods of use and preparation.

A nanoparticle that displays a coronavirus spike protein or a portion thereof on its surface, and methods of making and using the nanoparticle, are provided.

The present invention relates to vaccine composition comprising an immunologically effective amount of a viral fusion protein antigen, such as an RSV pre-fusion F protein, and a stabilizing amount of an antiviral compound, and to methods for preparing such vaccine compositions.

The present invention provides a vaccine composition for use in neurodegenerative diseases and an infectious virus vaccine composition for inducing an antibody recognizing the conformation of antigens. The vaccine composition of the present invention induces the production of an antibody recognizing the conformation of antigens. The antibody recognizing the conformation of antigens has high specificity for an antigen, and thus can be useful for ameliorating, preventing or treating diseases.

The present invention relates to a fusion protein having formula (I)
X.sub.1−Y−X.sub.2  (I),
wherein X.sub.1 and X.sub.2 comprise each four to six allergen fragments or variants thereof fused to each other, wherein said allergen fragments are derived from at least two allergens of the genus Dermatophagoides, and wherein Y is a carrier protein.

The present disclosure is directed to individual peptide immunogen constructs targeting portions of the Tau protein for the treatment and/or prevention of tauopathies. The present disclosure is also directed to compositions containing the peptide immunogen constructs, methods of making and using the peptide immunogen constructs, and antibodies produced by the peptide immunogen constructs.

The present invention relates to the construction and application of a fusion protein vaccine platform. The present invention provides a vaccine, comprising a fusion protein containing an interferon-target antigen-immunoglobulin Fc region (or antibody) and a Th cell helper epitope. The present invention also relates to use of a fusion protein containing an interferon-target antigen-immunoglobulin Fc region (or antibody) and a Th cell helper epitope in the preparation of prophylactic or therapeutic compositions. The vaccine of the present invention can be produced by eukaryotic cell expression systems to prepare wild-type and various mutant antigen vaccines, and vaccination by means of subcutaneous/muscular or nasal or other routes can lead to a strong immune response to a body. The vaccine of the present invention can be used as a prophylactic or therapeutic vaccine.

Methods are described for predicting ancestral sequences for viruses or portions thereof. Also described are predicted ancestral sequences for adeno-associated virus (AAV) capsid polypeptides. The disclosure also provides methods of gene transfer and methods of vaccinating subjects by administering a target antigen operably linked to the AAV capsid polypeptides.

Synthetic alphavirus-derived replicon expression systems comprising nucleic acid sequences encoding at least one modified nonstructural protein, and synthetic nucleic acid sequences encoding at least one heterologous protein are described. Methods of producing at least one heterologous protein in a cell, or of inducing an immune response in a subject by administering and/or expressing the synthetic alphavirus-derived replicon expression systems are provided.

An AAV vector comprising a nucleotide sequence encoding Factor I or Factor H or a fragment or derivative thereof. The vector is useful for treating or preventing a complement-mediated disorder of the eye.