Oh no, I can't believe it! That old chestnut about not breastfeeding with respiratory tract infections because of increased mucus!!! Holy tamale, I thought that one disappeared with the Spanish Inquisition. Oh no, I can't believe it! We are still running around looking for references when physicians say "prove to me that breastfeeding is *not* harmful". Dear Doctor, please find the references to show me that it is harmful to breastfeed while my child has croup. You can't find any. Well, since I know breastmilk is full of antibodies and other immune promoting factors, I will continue to breastfeed until you come up with the references. Jack Newman, MD, FRCPC