"There's been more studies that find that if you introduce them early it may actually prevent food allergy, " said David Fleischer, co-author of the article and a pediatric allergist at National Jewish Health in Denver.

WSJ: Food Allergy Advice for Parents: Start Peanuts, Eggs and More Sooner

Another potential benefit of immunotherapy is that if it's given early enough, it may prevent children with an allergy or two from developing many more, according to Dr. Canfield.

CNN: Finding relief as spring allergies rage on

Bassett says immunotherapy -- in other words, allergy shots -- are the only effective means to prevent these symptoms.

CNN: Global warming brings on more pollen

Once you know the specifics of your exact allergy profile, a customized solution can be found to prevent and successfully manage your seasonal allergies.

CNN: Ah-choo! 4 questions for the allergist