Particle-based Co-delivery of HIV immunogens as Next-generation HIV Vaccines: Tailored immunogens (such as Envs, monomers, native and/or native-like trimers, nucleic acids/RNA such as mRNAs, self-amplifying RNAs) combined with an effective multivalent antigenic display on nanoparticles for delivery may provide a strategy to promote strong and long-lived neutralizing antibody responses against HIV and direct affinity maturation toward HIV neutralizing antibodies. The objective of this contract is to evaluate the different co-delivery methods of a model HIV antigen using the VesiVax liposomal platform.