Extensive research into the field of stealth viruses has been done and while once this was a very controversial issue with many doubting even the existence of these types of viruses, they have now been scientifically proven to exist. Culturing methods for these viruses has improved and hard sequence data is now available on them which show how these viruses have assembled themselves, the way that they've recombined with other genes, the cellular, viral, bacterial origins. And it is now known that the stealth virus can take varying structural forms but it has the basic capacity to imbed itself in the brain, persist in the brain causing brain dysfunction. Unfortunately, a very real result of all this research has shown that that stealth viral infections can progress to very severe illness, including death.

And now it has also been found that stealth viruses are even more menacing because it has been discovered that they have the ability to acquire sequences of bacterial and even fungal origin. This strongly suggests that stealth viruses become viteria by infecting bacteria. Viteria are animal viruses that have incorporated bacterial genetic sequences. A brief summary of the viteria concept has been sento the FDA NIH and CDC and can be read here.
Viteria: A Menacing New Life Form
More can be read about viteria in this article. A Statement on Viteria

The stealth virus has now been shown to be involved with many chronic disabling illnesses such as Chronic Fatigue Syndrome, autism, Attention Deficit Disorder and many other diseases involving neurodegenerative symptoms with encephalopathy. There is a broad spectrum of symptoms involved with stealth virus infection which leads to the term multi-system stealth virus infection with encephalopathy (MSVIE). This has been seen in many, many patients tested by Dr. John Martin and now, unfortunately, this wide array of baffling symptoms is now also being seen in physicians that treat CFS patients. The case studies of 4 physicans with a wide array of differing symptoms is described in the paper CFS Among Physicians. These physicians all reported different signs and symptoms of their illness. They were all diagnosed as having CFS and all of them tested positive for the stealth virus.

When live SV-40 virus was found in formulin treated poliovrus vaccine, a switch was made to use kidney cells from African Green Monkeys using a live (attenuated) strain of poliovirus. Kidney cultures from all 12 monkeys tested grew out simian cytomegalovirus. Sequencing studies done by Dr. Martin on the stealth virus indicate that it originated in SCMV but the CDC and FDA have exhibited an unwillingness to have their vaccine safety procedures reviewed. Dr. Martin writes an in-depth account of the cover-up by government agencies of the contamination of vaccines even though SCMV is still being found in poliovaccine and the deadly risk of stealth virus infection that exists for children who are made to use these vaccines. Read the article Vaccine Safety