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.
Here are key facts about infectious mononucleosis: 1  Epstein-Barr virus (EBV) is a contagious infection that causes infectious mononucleosis. 2  The illness is spread by casual contact, usually via saliva. 3  Mono has an incubation period of 4 to 6 weeks. The illness is spread by casual contact, usually via saliva. 2  Mono has an incubation period of 4 to 6 weeks. 3  The vast majority of adults have antibodies against EBV, meaning they have been infected with the virus and are immune to mono.