Both my son and myself have done injections with Dr . Shah. We saw a clear decrease in symptoms within 2-3 months of beginning treatment, and we are both allergy free now, having completed treatment. Dr. Shah is great to work with. We had tried another allergy place, but the serums and office protocol was far superior with Dr. Shah, so we decided to switch back even though the drive was farther. My son no longer needs his nebulizer or inhaler, and doesn't even have allergy symptoms any more!