Levels of virus in tissue samples correlated with animal survival.
As a surer but more expensive backup, blood tests see how many have minuscule levels of virus, an indication that they have faithfully taken their pills.
In those who remained calmest, the levels of virus in the blood declined much more after beginning medication than they did in men who were the least calm.
Concern exists because low levels of virus have been detected in the blood of SARS patients up to 10 days after the onset of symptoms.
Most of the members have dwindling counts of disease-fighting cells and high levels of virus that go far beyond what doctors would consider acceptable without treatment.
H. Stewart Parker, the president of Targeted Genetics, said after the meeting that the levels of virus in the liver and spleen had been tiny, strengthening the company's view that its therapy was not at fault.
In many poor countries, distributing the drugs, teaching people to take them and monitoring levels of virus, T-cells and drug residues in the blood amount to a mammoth task.
The virus is transmitted from one person to another through bodily fluids and the sicker the patient becomes, the higher the levels of virus in those fluids, which include blood, urine and vomit.
This increased gene expression cannot be explained by increases in the levels of virus deposition, transcriptional activity of cells, or virus vector uptake into cells.
We recently established a non-human primate model of rotavirus infection that is characterized by consistent and high levels of virus antigen shedding in stools.
Indeed, the paper suggests, even the low levels of virus still circulating in their bodies seem, in several cases, to be shrinking still further.
