Immunology

Avoid allergy flare-ups this holiday season

(HealthDay)—Doctors are warning about the threat of COVID-19 transmission as cold weather forces people indoors. But indoor allergies could also take the joy out of your holiday season, an expert says.

Immunology

Q&A: What patients should know about fall and winter allergies

As we transition into colder months, fall and winter allergy sufferers may notice a change in their quality of life. If you're wondering whether or not you or your child have fall or winter allergies, here are some signs ...

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Allergen

An allergen is a nonparasitic antigen capable of stimulating a type-I hypersensitivity reaction in atopic individuals.

Most humans mount significant Immunoglobulin E (IgE) responses only as a defense against parasitic infections. However, some individuals mount an IgE response against common environmental antigens. This hereditory predisposition is called atopy. In atopic individuals, non-parasitic antigens stimulate inappropriate IgE production, leading to type I hypersensitivity. Sensitivities vary from one person to another and it is possible to be allergic to an extraordinary range of substances.

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