Middle ear infections are very common in young children, with 75% experiencing one by age 3. Symptoms include cold-like symptoms as well as fluid buildup behind the eardrum. Chiropractic care may help boost the immune system and reduce risks of diseases like cancer, according to a study that found chiropractic patients had significantly stronger immune responses compared to both healthy and sick patients. The Biggest Loser Kid Plan uses a traffic light system to teach children about making healthy food choices.