Here once again, non-related scientists take the concept of nanomolecules (in this case natural exosomes) with viral ligand on them (in this case, ACE2, same as NV-CoV-2) and use them to treat viral disease in animal models.
Exosomes are definitely safe (all cells produce them naturally).
Our observations demonstrate that evACE2 is a decoy antiviral mechanism to prevent SARS-CoV-2 infection, thus providing a rationale for the use of evACE2 to combat COVID-19.
Will NNVC ever put one of their nanoviricides into humans?