Infectious Venulitis

Infectious Venulitis (IVN) was a name proposed by Dr. Erich Ryll in response to the patients he saw during the 1975 Sacramento outbreak.

http://www.ncf-net.org/forum/InfVenulitis-Fall05.htm

Etymology
The name Infectious Venulitis refers to both the infectious nature of the illness Ryll observed, as well as inflammation of the venules (small blood vessels).

Presentation
Dr. Ryll describing infectious venulitis: "an influenza-like onset, often so severe in nature that I call it a flu-storm, with headaches, sore throat, fever, dizziness, runny nose, nausea and vomiting, muscle aching, extremity pain, and other features."

Also See
1975 Sacramento outbreak