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Undetectable Viral LoadAudio (En español)

When the amount of HIV in the blood is too low to be detected with a viral load (HIV RNA) test. Antiretroviral (ARV) drugs may reduce a person's viral load to an undetectable level; however, that does not mean the person is cured. Some HIV, in the form of latent HIV reservoirs, remain inside cells and in body tissues.

See Related Term(s):  Latent HIV Reservoir, Viral Load Test


UrinalysisAudio (En español)

Physical, chemical, and microscopic examination of urine. Urinalysis can detect a specific substance, such as glucose or blood, in the urine—this can be helpful in diagnosing a disease or monitoring the body's response to treatment.

Urogenital System

Also Known As: Genitourinary Tract

Urogenital Tract

Also Known As: Genitourinary Tract


UrolithiasisAudio (En español)

Calculi (stones) in the urinary tract. Use of some antiretroviral (ARV) drugs may cause urolithiasis.

UrticariaAudio (En español)

Also known as: Hives

Raised, swollen, itchy areas on the skin or mucous membranes, usually caused by an allergic reaction to a drug or food.