TTR and Ebola hemorrhagic fever: Small interfering RNAs (siRNAs) are able to silence almost any target gene after cellular delivery, providing them with great potential for gene therapy for various diseases, including cancer1, 2, hepatitis B caused by HBV3, Ebola hemorrhagic fever (EHF)4, TTR-mediated amyloidosis (ATTR)5, and diabetic macular edema (DME)6, among others.