Shingles - causes, symptoms, treatment, vaccination. Shingles is a viral infection, the first symptom of which is usually a tingling, sharp, burning pain under the skin, followed after 1-3 days by a red rash and blisters. Shingles is caused by the same virus as chickenpox (varicella zoster).
Rating: Be the first to rate this item. O.F.A.C. stands for the Office of Foreign Assets Control and is a part of the U. S. Department of the Treasury. The following definition was found on the OFAC web site:
1 The function f (x) = x 3 â 3 x + 1 is differentiable everywhere, with the derivative f â²(x) = 3 x 2 â 3. 2  It has two critical points, at x = â1 and x = 1. 3  The corresponding critical values are f (â1) = 3, which is a local maximum value, and f (1) = â1, which is a local minimum value of f.