Similarly, by encapsulatingmRNA of a viral surface protein (like the S-protein of COVID-19),it may be possible to produce mRNA vaccines that allow only specificcells to synthesize antigen proteins. In addition to antibodies, various ligand proteins may also be presenton the liposome membrane. Because wehave been able to produce antigen-bound liposomes using HER2 as amodel, our system can also be used to deliver anticancer drugs tocancer cells. Here, PROS1 is linked to COVID-19.