World PI Week from April 22-28 shines a spotlight on primary immunodeficiencies, immune system problems that patients are born with. Need more information? Visit the International Patient Organisation for Primary Immunodeficiencies and the Immune Deficiency Foundation.
![3 important stats about primary immunodeficiency, including that it affects 6 million people, there are an estimated 450 types and it takes 12 years, on average, for patient to get diagnosed.](https://www.csl.com/-/media/shared/vita-2022/pi_infographic_1600x2000_final.jpg?h=2000&iar=0&w=1600&hash=5159C3DFE0461A564EE387B51E454B79)