and described by the formula: where A is the amplitude of oscillation, f is the frequency, t is the elapsed time, and is the phase of the oscillation. The phase determines or is determined by the initial displacement at time t = 0. A motion with frequency f has period. Two potential ambiguities can be noted:
Incubation Period Shingles is not transmitted from exposure to another infected person so there is no applicable incubation period. Anyone who has recovered from varicella may develop shingles. Mode of Transmission Transmission of the virus occurs through direct contact with the rash or fluid from the lesions.
14 - 16 days on average (range 10 - 21 days). For chickenpox, the infectious period is as long as 5, but usually 1 - 2 days before the rash appears and until all the vesicles have formed scabs, usually within 5 days of rash onset.The infectious period for shingles is from rash onset for up to a week.4 - 16 days on average (range 10 - 21 days). For chickenpox, the infectious period is as long as 5, but usually 1 - 2 days before the rash appears and until all the vesicles have formed scabs, usually within 5 days of rash onset.