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Viral load, also known as viral burden, is a numerical expression of the quantity of virus in a given volume of fluid, including biological and environmental specimens. It is not to be confused with viral titre or viral titer , which depends on the assay.
A count of the viral load is routine before the start of HIV treatment. [1] If the treatment is not changed, then viral load is monitored with testing every 3–4 months to confirm a stable low viral load. [1] Patients who are medically stable and who have low viral load for two years may get viral load counts every 6 months instead of 3. [1]
The higher the viral load at the set point, the faster the virus will progress to AIDS; the lower the viral load at the set point, the longer the patient will remain in clinical latency, the next stage of the infection. The asymptomatic or clinical latency phase is marked by slow replication of the HIV virus, followed by steady depletion of CD4 ...
Virus quantification is counting or calculating the number of virus particles (virions) in a sample to determine the virus concentration. It is used in both research and development (R&D) in academic and commercial laboratories as well as in production situations where the quantity of virus at various steps is an important variable that must be monitored.
viral interference viral load. Also called viral burden and viral titre. A numerical expression of the quantity of virus in a given volume, typically expressed as the number of individual viral particles per unit volume but also by quantifying other factors that are closely related to or influenced by viral concentration. Viral load often ...
Suppressing the viral load to undetectable levels (<50 copies per ml) is the primary goal of ART. [56] This should happen by 24 weeks after starting combination therapy. [83] Viral load monitoring is the most important predictor of response to treatment with ART. [84] Lack of viral load suppression on ART is termed virologic failure.
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It means that if someone has an undetectable viral load, they cannot sexually transmit HIV to others. [1] U=U is supported by numerous health groups and organisations worldwide, including the World Health Organization (WHO). [2] The validity of U=U has been proven through many clinical trials involving thousands of couples.