The Ever-Increasing Array of Novel Inborn Errors of Immunity: an Interim Update by the IUIS Committee

The most recent updated classification of inborn errors of immunity/primary immunodeficiencies, compiled by the International Union of Immunological Societies Expert Committee, was published in January 2020. Within days of completing this report, it was already out of date, evidenced by the frequent publication of genetic variants proposed to cause novel inborn errors of immunity. As the next formal report from the IUIS Expert Committee will not be published until 2022, we felt it important to provide the community with a brief update of recent contributions to the field of inborn errors of immunity. Herein, we highlight studies that have identified 26 additional monogenic gene defects that reach the threshold to represent novel causes of immune defects.

Automated summary

The latest classification of inborn errors of immunity/primary immunodeficiencies by the International Union of Immunological Societies Expert Committee, published in January 2020, quickly became outdated due to the rapid pace of genetic variant discoveries in the field. To bridge the gap until the next official report in 2022, researchers have highlighted 26 additional monogenic gene defects as novel causes of immune defects.