Elderberries have long been used to treat colds, flu, and as an overall boost to the immune system.  Horehound and Elecampane are wonderful for colds and coughs.  Mullein is soothing to the mucous membranes and has historically been used to treat asthma, bronchitis, and allergies.  Mullein's anti-bacterial properties make it effective in treating infections.  It has even been used to treat tuberculosis as it inhibits mycobacterium, the bacteria which causes the disease.
 
*These statements have not been evaluated by the FDA. These products are not intended to prevent, diagnose, treat, or cure any disease.