Abstract: The invention relates to vaccine compositions for inducing an immune response to a coronavirus in a subject, and uses thereof. In particular, the vaccine comprises of a chimeric or fusion protein comprising a) a N-terminal secretion signal peptide; b) an amino acid sequence of the receptor binding domain (RBD) of a spike protein of a coronavirus; and c) a C-terminal domain comprising a transmembrane region and a cytoplasmic region. In a preferred embodiment, the signal peptide, RBD, transmembrane region, and cytoplasmic region are derived from SARS-CoV-2, and that the vaccine composition is formulated as a lipid nanoparticle (LNP).

Abstract: The present invention is directed to lipid nanoparticles, formulations containing lipid nanoparticles and methods of treating diseases or conditions with said lipid nanoparticles and formulations thereof. A lipid nanoparticle comprising (a) an active agent; (b) a cationic and/or ionisable lipid comprising from about 40 mol % to about 60 mol % of the total lipid present in the nanoparticle; (c) a phospholipid comprising from about 5 mol % to about 20 mol % of the total lipid present in the nanoparticle; (d) a structural lipid comprising from about 30 mol % to about 50 mol % of the total lipid present in the nanoparticle; (e) a PEGylated lipid comprising from about 0.05 mol % to less than 0.5 mol % of the total lipid present in the nanoparticle.