What is common variable immunodeficiency (CVID)?

Updated: Oct 16, 2018
  • Author: C Lucy Park, MD; Chief Editor: Harumi Jyonouchi, MD  more...
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Common variable immunodeficiency (CVID), one of the most prevalent primary immunodeficiency diseases, is a heterogeneous group of immunologic disorders of unknown etiology. CVID is characterized by marked reduction in serum levels of immunoglobulin G (IgG) and immunoglobulin A (IgA), as well as reduced immunoglobulin M (IgM) in about half of cases. [1]

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