Methods and compositions are provided that can be used to vaccinate against and treat HIV. Specifically contemplated are vaccine compositions and methods of using these compositions treat HIV in patients. Aspects of the disclosure relate to an anti-CD40 antibody-HIV antigen fusion protein comprising (i) an anti-CD40 heavy chain (HCD40)-HIV antigen (Ag) fusion protein comprising the formula: HCD40-Ag, wherein Ag is a polypeptide with at least 80% sequence identity to SEQ ID NO:1; and (ii) an anti-CD40 light chain (LCD40).

Embodiments of immunogens based on the HIV-1 Env fusion peptide and methods of their use and production are disclosed. Nucleic acid molecules encoding the immunogens are also provided. In several embodiments, the immunogens can be used to generate an immune response to HIV-1 Env in a subject, for example, to treat or prevent an HIV-1 infection in the subject.

The invention features stabilized human immunodeficiency virus (H IV) clade C envelope (Env) trimers. The invention also features vaccines, nucleic acids, and vectors to deliver and/or facilitate production of the stabilized HIV clade C Env trimers. In addition, the invention features methods of making and using the stabilized HIV clade C Env trimers of the invention.

The present disclosure is directed to oral vaccine dosage forms and processes for producing the oral vaccine dosage forms. The dosage forms include lipid-based vesicles (e.g., virosomes, liposomes) harboring an immunogenic amount of at least one vaccinal target molecule, with or without adjuvant. Specifically, Applicants discovered a combination of the composition of the liquid virosome concentrates, the composition of the base matrix for the solid dosage form formulation (excluding the virosome concentrate), and the manufacturing conditions for the dosage forms that can produce a freeze dried sublingual dosage form having physical robustness, particle and antigen integrity and stability.

Stabilized trimers of a clade A strain and a clade C strain of HIV-1 are provided. Broadly neutralizing antisera against HIV-1, methods of making broadly neutralizing antisera against HIV-1, broadly neutralizing vaccines against HIV-1, as well as methods of treating subjects infected with HIV, preventing HIV infection, and inhibiting HIV-mediated activities are also provided.

Embodiments of immunogens based on the outer domain of HIV-1 gp120 and methods of their use and production are disclosed. Nucleic acid molecules encoding the immunogens are also provided. In several embodiments, the immunogens can be used to prime an immune response to gp120 in a subject, for example, to treat or prevent an HIV-1 infection in the subject.

In certain aspects the invention provides HV-1 immunogens, including envelopes (CH0848) and selections therefrom, and methods for swarm immunizations using combinations of HIV-1 envelopes.

Methods and compositions are provided that can be used to vaccinate against and treat HIV. Specifically contemplated are vaccine compositions and methods of using these compositions treat HIV in patients. Aspects of the disclosure relate to an anti-CD40 antibody-HIV antigen fusion protein comprising (i) an anti-CD40 heavy chain (HCD40)-HIV antigen (Ag) fusion protein comprising the formula: HCD40-Ag, wherein Ag is a polypeptide with at least 80% sequence identity to SEQ ID NO:1; and (ii) an anti-CD40 light chain (LCD40).

The present invention relates to a method for reducing the occurrence and/or severity of viral infections. The method embodies procedures for expanding HIV from the blood of HIV antibody negative donors and deriving a non-infectious virus particle product that is antigenic. The procedures for deriving the antigenic, non-infectious virus particle product are optimally designed to maintain the integrity of the envelope proteins while maximizing the depletion of capsid proteins and RNA. The resulting virus particle product, when introduced into humans or non-human animals, enables the production of antibodies that target the natural envelope macromolecular structure that is required for infectivity. The present invention can be applied to producing virus stocks from the blood of HIV-seronegative donors, for deriving non-infectious virus particles that retain intact envelope proteins, for producing anti-viral antibodies, and for administering anti-virus antibodies to patients.

Stabilized trimers of a clade A strain and a clade C strain of HIV-1 are provided. Broadly neutralizing antisera against HIV-1, methods of making broadly neutralizing antisera against HIV-1, broadly neutralizing vaccines against HIV-1, as well as methods of treating subjects infected with HIV, preventing HIV infection, and inhibiting HIV-mediated activities are also provided.