X-linked hyper IgM syndrome (XHIM) is an immunodeficiency disorder caused by mutations of the gene encoding CD154. Why is this disease characterized by recurrent infections (starting in childhood) and elevated serum levels of IgM?

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The Answer of X-linked hyper IgM syndrome (XHIM) is an immunodeficiency disorder caused by mutations of the gene encoding CD154. Why is this disease characterized by recurrent infections (starting in childhood) and elevated serum levels of IgM?

X-Linked Hyper IgM Syndrome (XHIM) Is an Immunodeficiency Disorder Caused