The uncontrolled growth of normal cells. No one knows for sure what the cause is. There are many theories. The body encapsulates the tumor, more localized. They invade healthy cells and replicate there.
Viruses can lie dormant for many years until conditions support their activation.
They enter the body via the respiratory system, open skin and breaks in the mucous membranes. Antibiotic therapy is not an effective treatment. Virus is systemic. Human Immunodificiency Virus. Acquired Immune Deficiency Syndrome.