Videos Thank you for visiting Colorado Allergy & Asthma Centers’ video page. Please click on any of the videos below to learn more about our practice and the conditions the we diagnose and treat. Allergy Skin Testing: We’ve Got Your Back Allergy Shots 101 How Do Allergy Shots Work Allergy Shots or Medications? Do I Need an Appointment for Allergy Shots? Allergy Skin Testing Explained by Dr. Katherine Tsai What An Allergist Does Immunotherapy Video Patient Resources Drug Disposal Education de Paciente FAQs Patient Education Returning Patients School Forms Videos Welcome New Patients!