There are no effective treatments for<unk>  diseases. Clinical trials in humans have not met with success and have been hampered by the rarity of<unk>  diseases. Although some potential treatments have shown promise in the laboratory, none have been effective once the disease has commenced.
Prion
TRNA 
Lentivirus
Glycol nucleic acid
Genetically modified virus
Protein corona
Reporter virus particles
Microorganism