Diseases & Conditions

Fish Allergy

What Is a Fish Allergy? A fish allergy is not exactly the same as a seafood allergy. Seafood includes fish (like tuna or cod) and shellfish (like lobster or clams). Even though they both fall into the category of “seafood,” fish and shellfish are biologically different. So shellfish will only cause an allergic reaction in …

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Egg Allergy

What Is an Egg Allergy? When someone has an egg allergy, the body’s immune system, which normally fights infections, overreacts to proteins in egg. If the person drinks or eats a product that contains egg, the body thinks these proteins are harmful invaders. The immune system responds by working very hard to fight off the invader. …

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Coronavirus (COVID-19) and Multisystem Inflammatory Syndrome in Children (MIS-C)

Also called: Pediatric Multisystem Inflammatory Syndrome (PMIS); Pediatric Inflammatory Multisystem Syndrome (PIMS) What Is Multisystem Inflammatory Syndrome in Children (MIS-C)? Coronavirus (COVID-19) seems to usually cause a milder infection in kids than in adults and older people. But some children have developed more serious symptoms, sometimes several weeks after being infected with the virus. Doctors are …

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Celiac Disease

What Is Celiac Disease? Celiac disease is an autoimmune disorder. It happens when someone has a food intolerance to gluten. Gluten (GLOOT-in) is the general name of proteins found in wheat, rye, barley, and other grains. In celiac (SEE-lee-ak) disease, the body can’t absorb important nutrients. If that happens, a person can become malnourished. Doctors don’t know …

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Allergy Shots

What Are Allergy Shots? Allergy shots (allergen immunotherapy) can treat some types of allergies. They’re sometimes used for children with allergies to: things in the environment, like pollen, mold, or dust mites pet dander insect stings Allergy shots aren’t helpful for food allergies. Why Are Allergy Shots Used? An allergy is when the body’s immune system overreacts to a usually harmless substance. …

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All About Allergies

What Are Allergies? Allergies are abnormal immune system reactions to things that are typically harmless to most people. When a person is allergic to something, the immune system mistakenly believes that this substance is harming the body. Substances that cause allergic reactions — such as some foods, dust, plant pollen, or medicines — are known as allergens. Allergies …

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