Amanda Davis wrote -April is Primary Immune Deficiency Disease (PIDD) Awareness month! I'm only one of many patients living with a Primary Immune Deficiency Disease. Please join me in supporting the Immune Deficiency Foundation (IDF) who works tirelessly to help PIDD patients by creating awareness, education and advocacy. In medical school, doctors are taught that when they hear hoof beats, they should think horses, not zebras (meaning it's usually the most obvious diagnosis). Patients with PIDD are truly the zebras of the medical community. Any donation amount (great or small) is greatly appreciated. Think Zebra!!