11.   But researchers convinced the board that it was reasonable to withhold the viral load because subjects should not be basing their decisions on it.

12.   But they warned that doctors who use the viral load as a benchmark may be misled into thinking the woman is healthier than she really is.

13.   But then it stopped working, and my viral load started to rise again, doubling about every six to eight weeks.

14.   Chiron Corp. has also submitted an application for its viral load test, the Quantiplex HIV RNA assay.

15.   Doctors said that when they could not use viral load to direct treatment, patients were not receiving optimal care.

16.   Experts published a list of guidelines for using viral load in the June issue of the journal Nature Medicine.

17.   Her plan was to watch her test results closely, particularly her viral load, a measurement of virus levels in the bloodstream.

18.   His viral load continues to climb, and his fatigue is mounting as well.

19.   His viral load, the measure of HIV in the blood, dropped so low that doctors could no longer detect it.

20.   In recent years, doctors have used a test that measures the viral load, or number of AIDS viruses in the blood, to guide drug therapy.