hypogammaglobulinemia

https://doi.org/10.1351/goldbook.13246
Immunodeficiency state marked by abnormally low levels of all classes of immunoglobulins (Ig), associated with increased susceptibility to infectious diseases.
Note: It may be primary (inherited), or secondary (acquired), or it may occur physiologically in normal neonates.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1181 [Terms] [Paper]