Select the causes of secondary immunodeficiencies:

Combined B-cell and T-cell deficiencies include: severe combined immunodeficiency, Wiskott–Aldrich syndrome, ataxia telangiectasia, and MHC class II deficiency.

Eosinophils are the prime mediators of anaphylaxis. These cells are found throughout connective tissue, particularly near blood and lymphatic vessels.

Complete the statement. A condition in which the body produces autoantibodies and immunologically competent T-cells against its own tissues is called . 

Match the types of hypersensitivity reactions with the time of onset of their symptoms:

Complete the statement. Antigens that are not present during fetal ripening are considered and usually induce an immunological response against these antigens.

Complete the statement. Typically, the causative agent of a delayed-type hypersensitivity reaction is rapidly eliminated with tissue damage.

Select allergens that initiate the development of an immediate hypersensitivity reaction:

Complete the statement. According to the clonal deletion theory, self-reactive T-cells die as a result of activation of the process.

Specify the causes of immunodeficiencies: