Extensively researched in Europe and the U.S. Echinacea has clearly been shown to increase immune response. Published research has proven echinacea to be an effective tool against cold and flu. Echinacea is a safe and gentle first line defense against common viral infections. Lemon Balm is apleasant tasting member of the mint family that has demonstrated antiviral properties. It is rich in volatile oils containing rosmarinic and caffeic acids which are powerful antioxidants and viral inhibitors. Research conducted in Israel shows that Elderberry is a strong antiviral agent. The sweet fruity berries inhibit viral replication and may shorten the duration of colds flu and upper respiratory infections.