Put first 6 ingredients in a large pot and simmer over low heat until reduced by half.
Cool until your are able to handle the liquid without scalding but it is still warm.
Strain herbs from liquid, being sure to squeeze as much liquid as possible.
Measure the remaining liquid. If it is below 2 1/2 cups add enough pure water to bring it back up to that amount.
Add the honey to the liquid and stir to dissolve.
Basic instructions for dosing are 1 TBSP daily for adults and 1 tsp daily for children. If you feel a cold coming on you can increase that dose to 4 times a day.