Disease the time between infection and the appearance of symptoms. The latency period is the time between infection and the ability of the disease to spread to another person, which may precede, follow, or be simultaneous with the appearance of symptoms. Some viruses also exhibit a dormant phase, called viral latency, in which the virus hides in the body in an inactive state. For example, varicella zoster virus causes chickenpox in the acute phase; after recovery from chickenpox, the virus may remain dormant in nerve cells for many years, and later cause herpes zoster (shingles). Diseases may be classified by cause,
Chronic Lyme disease whereby pseudomedicine is legislated into practice. The term "chronic Lyme disease" is distinct from untreated late-stage Lyme disease, which can cause arthritis, peripheral neuropathy and/or encephalomyelitis. Chronic Lyme disease is also distinct from the 'post-treatment Lyme disease syndrome' (PTLDS)", when symptoms linger after standard antibiotic treatments. PTLDS is estimated to occur in less than 5% of people who had Lyme disease and were treated. In many cases there is no objective evidence that people who believe they have chronic Lyme have ever been infected with Lyme disease: standard diagnostic tests for infection are often negative. While it is undisputed people