What are the routes of exposure of an allergen?

Allergens can enter the body through several routes of exposure, including inhalation, ingestion, and direct contact with the skin. Inhalation occurs when airborne allergens, such as pollen or dust mites, are breathed in. Ingestion happens when allergens, like certain foods, are consumed. Direct contact can occur through skin exposure to substances like latex or certain plants, leading to localized allergic reactions.