Ganciclovir
Ganciclovir has also been used with some success in treating "Human herpesvirus 6" infections.
Hepatitis C virus
Sofosbuvir for use against chronic hepatitis C infection was approved by the FDA December 6, 2013. It has been reported to be the first drug that has demonstrated safety and efficacy to treat certain types of HCV infection without the need for co-administration of interferon. On November 22, the FDA approved simeprevir for use in combination with peginterferon-alfa and ribavirin. Simeprevir has been approved in Japan for the treatment of chronic hepatitis C infection, genotype 1.