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Shedding period usually coincides with the infectious period and used as its synonym. [2] For viral infections, viral load and viral shedding are important related concepts. Viral load refers to the quantity of virions (individual virus particles) in a given bodily fluid like blood, saliva, urine, etc. at different moments after infection ...
This helps in the evaluation of the outcomes of control measures based on symptomatic surveillance. The incubation period is also useful to count the number of infected people. [1] The period from the time of infection to the time of becoming infectious is called the pre-infectious period or the latent period. During the pre-infectious or ...
The prodrome is a period during which an individual experiences some symptoms and/or a change in functioning, which can signal the impending onset of a mental health disorder. [5] It is otherwise known as the prodromal phase when referring to the subsyndromal stage or the early abnormalities in behavior, mood, and/or cognition before illness ...
Prodromal: the first signs or symptoms appear, which indicates the clinical start of the disease. [ 7 ] [ 8 ] Clinical : specific signs and symptoms appear, which allows the doctor to not only identify the disease but also determine the appropriate treatment in hopes of curing the patient or at least preventing long-term damages.
After the latency period (but before clinical infection) the infected person can transmit the disease without signs of any symptoms. Such infection is called subclinical infection. Incubation period (also known as the latent period or latency period ) is the time elapsed between exposure to a pathogenic organism, a chemical, or radiation , and ...
The window period for HIV may be up to three months, depending on the test method and other factors. RNA based HIV tests has the lowest window period. Modern and accurate testing abilities can cut this period to 25 days, 16 days, or even as low as 12 days, again, depending on the type of test and the quality of its administration and interpretation.
The stages of HIV infection are acute infection (also known as primary infection), latency, and AIDS. Acute infection lasts for several weeks and may include symptoms such as fever, swollen lymph nodes, inflammation of the throat, rash, muscle pain, malaise, and mouth and esophageal sores. The latency stage involves few or no symptoms and can ...
Assume the rectangular stationary age distribution and let also the ages of infection have the same distribution for each birth year. Let the average age of infection be A, for instance when individuals younger than A are susceptible and those older than A are immune (or infectious). Then it can be shown by an easy argument that the proportion ...