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.
The potential maximum incubation period for all 20 patients was 11â39 days, and the potential minimum incubation period was 7â32 days. The median incubation period for all 20 patients was 18 days (range 7â39 days) (Figure.igure. Incubation period for 20 patients in Chile in whom hantavirus cardiopulmonary syndrome caused by Andes virus developed after various periods of exposure. All patients progressed to the cardiopulmonary phase and were hospitalized at the end of the prodrome.