Ginger contains compounds which inhibit rhinoviral activity. - GreenMedInfo Summary
Isolation of antirhinoviral sesquiterpenes from ginger (Zingiber officinale).
Brain Res. 2004 Sep 10;1020(1-2):1-11. PMID: 8064299
The dried rhizomes of Indonesian ginger, Zingiber officinale, were investigated for antirhinoviral activity in the plaque reduction test. Fractionation by solvent extraction, solvent partition, and repeated chromatography guided by bioassay, allowed the isolation of several sesquiterpenes with antirhinoviral activity. The most active of these was beta-sesquiphellandrene  with an IC50 of 0.44 microM vs. rhinovirus IB in vitro.