The method of immunotherapy consists of a small dose in starting, so that one will not cause any reaction. But slowly, its dosage is increased until the person becomes tolerable to large amount of dosage. Initially, injections are given twice a week and after some time, they are given every two to four weeks. If you are also suffering from allergy, just rely on Gamma Allergy for Immunotherapy as they only use bulk allergen extracts in compounding which have been standardised for decades by the FDA. https://www.madinamerica.com/author/how-to-get-rid-of-allergy-with/