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.
below are examples of the incubation periods for some infections chickenpox 1 3 weeks diphtheria 2 5 days flu usually around 1 3 days measles about 10 12 days with a further 2 4 days before the rash appears mumps around 17 days with a range of 12 25 days