What Kind of Particle Nanoparticles Are in Clinical Use?

In the clinic, it's really mostly lipid nanoparticles at the moment and maybe a few polymer nanoparticles. I'm pretty up with the vaccine literature right now. And all of the clinical trials are with some type of liposomal cationic lipid kind of formulation. As to other types of clinical trials, Bob, on nucleic acids, do you know any that are non-lipid?