| CPC A61K 39/235 (2013.01) [A61K 39/21 (2013.01); A61P 35/00 (2018.01); A61P 35/04 (2018.01); C07K 14/005 (2013.01); C12N 7/00 (2013.01); C12N 15/86 (2013.01); A61K 2039/525 (2013.01); A61K 2039/5258 (2013.01); A61K 2039/545 (2013.01); A61K 2039/585 (2013.01); C12N 2710/10043 (2013.01); C12N 2740/10022 (2013.01); C12N 2740/10023 (2013.01); C12N 2740/10034 (2013.01); C12N 2740/10071 (2013.01)] | 13 Claims | 
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               1. A virus-like particle (VLP), wherein the VLP is encoded by a nucleic acid molecule encoding a Gag protein and an ERV envelope (Env) protein or an immunogenic part thereof, wherein the native genomic structure connecting Gag and Env has been replaced by an operative linker, wherein the ERV is HERV-K. 
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