That is interesting about the ginger, thanks for sharing. Take a look at Super Lysine by Quantum, it has some immune boosting herbals and lysine which as an amino acid has reports of helping with viral conditions. There is also a nice formula from Zand called Astragulus Plus which contains a synergistic blend of Chinese herbs that support immunity. It is similar to a 'deep chi builder' formula. These products do contain licorce when used in safe levels is quite effective, higher levels can cause some issues.