> Hepatitis F is a hypothetical virus linked to hepatitis. This is also known as a    nonexistent virus as well. Most recently, in 1994 Deka et al reported that novel viral    particles had been discovered in the stool of post-transfusion, non-hepatitis A,    non-hepatitis B, non-hepatitis C, non-hepatitis E patients.
> Injection of these particles, into the bloodstream of Indian rhesus monkeys caused    hepatitis, and the virus was named hepatitis F, or Toga virus.
> Further investigations failed to confirm the existence of the virus, and it was delisted
   as a cause for infectious hepatitis.