DOI: 10.1503/cmaj. 045280 tection of subjects who had milder illness but believed they had
experienced a cold. The effect of the case definition used by Predy and colleagues is to limit …

DOI: 10.1503/cmaj. 045280 tection of subjects who had milder illness but believed they had
experienced a cold. The effect of the case definition used by Predy and colleagues is to limit …

Background: Standardized ginseng extract has become the best-selling cold and flu remedy
in Canada, yet much controversy regarding the efficacy of ginseng in preventing common …

Background: Upper respiratory tract infections are a major source of morbidity throughout
the world. Extracts of the root of North American ginseng (Panax quinquefolium) have been …

The aim of the study was to determine the properties of a standardized extract of ginseng
root in inducing a higher immune response in vaccination against influenza. Attention was …

Objectives: To compare a proprietary extract of American ginseng, CVT‐E002, with placebo
in preventing acute respiratory illness (ARI) in an institutional setting during the influenza …

The common cold is the leading cause of doctor visits in the United States and annually
results in 189 million lost school days. In the course of one year the US population contracts …

Methods: We surveyed university-associated family physicians and published common cold
researchers (“experts”) regarding evidence-of-benefit and magnitude-of-benefit for 8 …

The common cold and influenza are respiratory illnesses. However, they are caused by
different viruses. Because these two types of illnesses have similar symptoms, it can be …

Background: COLD-fX (CVT-E002), a proprietary extract of the roots of North American
ginseng (Panax quinquefolium), rich in poly-furanosyl-pyranosyl-saccharides, has been …