http://virology-online.com/index.html I have posted some stuff on this in the lerner/montoya thread but thought it was worth a thread of its own. Lots of info on viruses, immunocompromised patients and testing, may take abit of digging to find exactly what you are looking for but along the way you will come across alot of other interesting info. If only most doctors read this type of info, many of us would be alot better off. cheers!!!