Birch Antigen is a specific substance derived from birch tree pollen used in allergy testing and diagnosis. Birch pollen is a common allergen that can cause allergic reactions, particularly during the spring season. The Birch Antigen is extracted and purified from birch tree pollen and is used to identify individuals who are allergic to birch pollen. It is typically used in skin prick tests or blood tests to determine allergic responses. By measuring specific antibodies in the blood or conducting skin prick tests, healthcare professionals can accurately diagnose birch pollen allergies and provide appropriate management and treatment plans.