~ Food Has Power ~
onion soup, onion honey (over age 1), onion bath, onion broth, onion poultice. Epsom salt baths, magnesium would be my goto.
Steam helped ds. And hydration. Wet sock treatment helps too.
Homeopathic Ipecac helped our son. Homeopathic Dorsera helped our friend's dd.
Vit A, C, D, zinc are keys to immune support, in addition to whole food probiotics.
Chicken soup (homemade) is demonstrated to shorten the duration of respiratory illness.
More herbal alternatives:
Green/black tea help too! http://www.greenmedinfo.com/disease/pertussis