Postviral fatigue syndrome

Post Viral Fatigue Syndrome (PVFS) is a subgroup of illness under the ME/CFS umbrella.

Controversy
Although the PVFS term is used in some literature and by some clinicians, medical literature does not call it this. Some medical literature uses Post-viral syndrome and it is noted that current interest focus on recent or persisting infection with Coxsackie viruses. It is claimed that a balanced view of the syndrome is a "mixture of organic and psychiatric function".

There is no formal research into PVFS or PVS. The Oxford criteria has a Post-infectious Fatigue Syndrome (PIFS) as one of its definitions. The Argus Report article US NIH Report Calls for UK Definition of ME/CFS to be Scrapped by Penny Swift states: "The (NIH) has issued a draft report that highlights the dire need for scientific research that will help find a cure for the millions of people suffering from myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) worldwide. The report also highlights the fact that the decades-old UK Royal Society of Medicine’s Oxford criteria for ME/CFS are severely “flawed,” and that continuing to use these criteria may “cause harm.” Further, the NIH report says that the Royal Society definition should “be retired” and replaced with a single case definition agreed to by the ME/CFS community."