Allergic rhinitis, also known as hay fever, runs strongly in families.

More than 12 million Americans have food allergies.

Most people who have had an allergic reaction to something they ate thought that it was safe.

Hives can last for hours, or up to several days before fading.

Most insect stings occur in the summer and fall, causing those who are allergic to insect stings to be at greatest risk during these months.

The best time to take an antihistamine, which helps block allergic reactions, is before the symptoms surface.

As many as 20 percent of Americans believe they have a food allergy, but only 2-3 percent really do.