For skewed distributions, it is quite common to have one tail of the distribution considerably longer or drawn out relative to the other tail. A skewed right distribution is one in which the tail is on the right side. A skewed left distribution is one in which the tail is on the left side. The above histogram is for a distribution that is skewed right. Skewed distributions bring a certain philosophical complexity to the very process of estimating a typical value for the distribution.
Herpes zoster is a clinical manifestation of the reactivation of latent varicella zoster virus infection. It is a cause of considerable morbidity, especially in elderly patients, and can be fatal in immunosuppressed or critically ill patients.erpes zoster is a clinical manifestation of the reactivation of latent varicella zoster virus infection. It is a cause of considerable morbidity, especially in elderly patients, and can be fatal in immunosuppressed or critically ill patients.
The pain is the result of the damage to the nerve. This is caused by the virus travelling along the nerve before appearing on the surface of the skin that the nerve supplies. On the skin surface herpes zoster causes inflammation, redness and clumps of blisters (vesicles). These form scabs as the condition progresses. With healing, the scabs fall off, sometimes leaving some scarring. The length of time for the symptoms to subside varies with the severity of the infection.