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Boys with congenital Bruton’s agammaglobulinemia present with recurrent pyogenic infections at the time when maternal antibodies in the boy’s serum begin to fall off significantly.  This occurs:

Which of the following serum tests is the best for screening for systemic lupus erythematosus, i.e., has the best sensitivity for screening?

A child eats some peanuts and within minutes, develops urticaria (hives) involving their lips and becomes short of breath.  This reaction is mediated by:

In the context of Type I hypersensitivity (Immediate type hypersensitivity), the antigens which play a role in initiating the hypersensitive reaction are also known as:

A child eats some peanuts and within minutes, develops urticaria (hives) involving their lips and becomes short of breath.  This reaction is mediated by:

What are the two most important risk factors for type 2 diabetes?

Common variable immunodeficiency is often diagnosed in adulthood.  It is characterized by:

After taking notes in a meeting, the paralegal should transcribe those notes more thoroughly later that day. 

Mast cells have Fc receptors for:

In a kinetic nephelometric assay in which the slope of the increase in light scatter between an initial and a subsequent timepoint is used to determine the concentration of the antigen to be measured, it is important to ensure that increasing antigen concentration is always associated with increasing light scatter (increasing precipitation).  This condition applies throughout which zone(s) of the antigen-antibody precipitation curve: