Virus diseases are widespread diseases in nature caused by viruses and found in humans, animals, birds, fish, insects, plants, protozoa, and even bacteria. In man, virus diseases include smallpox and chicken pox, measles, herpes, influenza, German measles, mumps, poliomyelitis, viral hepatitis, endemic encephalitis (transmitted by ticks, mosquitoes, and other insects), trachoma, and yellow fever. The incubation period of virus diseases is from two or three days (influenza, certain kinds of encephalitis, and others) to 30 days and longer (rabies, epidemic hepatitis, and others). Infection can occur via air, food, milk, water, or various objects, and through the bite of bloodsucking arthropoda (mosquitoes, sand flies, and ticks).
Virginia Livingston-Wheeler, a trained physician, claimed she identified a mycobacterium Progenitor cryptocides that causes cancer only when the immune system is inadequate. Even more intriguing, she claimed that P. cryptocides is actually a pleomorphic organism, capable of changing its shape and evolving through a series of forms (fungal-like, viral-like). She then developed a vaccine she believed would help stimulate the patient's immune system to produce antibodies against P. cryptocides and control it. Her findings are disputed by the mainstream medical profession.