Provided herein are methods and compositions for stabilization of active agents. The active agents are distributed, mixed or embedded in a silk fibroin matrix, thereby retaining the bioactivity of the active agents upon storage and/or transportation. In some embodiments, the storage-stable vaccine-silk compositions are also provided herein.

Provided herein is a nucleic acid (e.g., messenger RNA) vaccine encoding at least one antigenic prokaryotic polypeptide linked to one or both of a viral secretion signal peptide and a transmembrane domain. Also provided are methods of vaccination against a prokaryotic infection with the nucleic acid described herein.

Provided herein is a nucleic acid (e.g., messenger RNA) vaccine encoding at least one antigenic prokaryotic polypeptide linked to one or both of a viral secretion signal peptide and a transmembrane domain. Also provided are methods of vaccination against a prokaryotic infection with the nucleic acid described herein.

The present invention relates to a vaccine composition for reducing the size or volume of a target tissue, containing a genetic material that encodes a foreign antigen and, preferably, the composition can be provided as a vaccine composition for treating or preventing obesity. The vaccine composition can be provided as a composition for removing subcutaneous adipocytes.

The present invention relates to a vaccine composition for reducing the size or volume of a target tissue, containing a genetic material that encodes a foreign antigen and, preferably, the composition can be provided as a vaccine composition for treating or preventing obesity. The vaccine composition can be provided as a composition for removing subcutaneous adipocytes.

Vaccination methods include applying to a subject a microneedle patch having microneedles including a vaccine formulation including one or more infectious disease antigens. Infant and child subjects were found to tolerate application of the patch for a period effective to administer the antigen. The patch may be applied to the skin of a subject for an application period of five minutes or less, and effective to administer the antigen to the subject, wherein at least 50% of the height of the microneedle dissolves into the skin of the subject during the application period. Thermally stable vaccine formulations for the microneedles are provided. The methods may be effective to protect the subject from the infectious disease even if, prior to the applying step, the drug delivery device is transported or stored out of cold chain conditions for up to 14 days.

A hybrid protein comprises a first domain comprising a sequence encoding a surface protein of an enveloped RNA virus and a second domain comprising a sequence encoding an ectodomain of a type 2 transmembrane domain protein, wherein the second domain is located at the C-terminal of the first domain. The hybrid protein or an mRNA encoding such protein can be used as a vaccine against the infection of the enveloped RNA virus.

A hybrid protein comprises a first domain comprising a sequence encoding a surface protein of an enveloped RNA virus and a second domain comprising a sequence encoding an ectodomain of a type 2 transmembrane domain protein, wherein the second domain is located at the C-terminal of the first domain. The hybrid protein or an mRNA encoding such protein can be used as a vaccine against the infection of the enveloped RNA virus.

Compositions containing two or more lipid nanoparticles, each containing a different mRNA, are described.

Compositions containing two or more lipid nanoparticles, each containing a different mRNA, are described.