An allergic reaction is your body’s response to a substance that it deems dangerous or potentially deadly. Spring allergies, for example, are caused by pollens or grasses. A deadlier type of allergic ...

If you or someone you’re with is experiencing anaphylaxis, call 911 or your local emergency services immediately. Help them use an epinephrine auto-injector (sometimes called an EpiPen) if they have ...

Leukemoid reaction and chronic myeloid leukemia (CML) can both cause a high white blood cell count. However, they typically increase the levels of different types of white blood cells. CML and ...

Infusion reactions, also known as acute infusion reactions or infusion-related reactions, are common adverse effects that can occur when a person receives medication intravenously. Infusion reactions ...

Bee, wasp, yellow jacket, hornet, and fire ant are the insect stings that most often trigger allergic reactions. But most people aren't allergic to insect stings and may mistake a normal sting ...

Reaction formation is a defense mechanism in which people express the opposite of their true feelings, sometimes to an exaggerated extent. For instance, a man who feels insecure about his masculinity ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Allergic reactions are a serious condition many Americans face due to an abnormal immune response in the body that, in some cases, can result in death. An allergic reaction occurs when the immune ...