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Certain complement components stimulate inflammation and phagocytosis.

It is necessary to do lab tests to diagnose all diseases.

Food allergies include gastrointestinal symptoms and often hives.

Autoantibodies cause tissue injury in all of the following diseases except ________.

Components of the first line of defense include all the following except ________.

Food allergies include gastrointestinal symptoms and often hives.

Which lymphocytes lack specificity for antigen and are cells that attack cancer cells and virus-infected cells?

A 16-year-old male with a low-grade fever, and large and painful red sores around his lips is being evaluated at a pediatric clinic. He has a PCR test pending that was swabbed from the sores, as well as a blood culture with Gram stain, and nasopharyngeal specimen for microscopic examination.   Which of the following can be determined from phenotypic assessment of the nasopharyngeal sample? 

What could result when grafted tissue such as bone marrow contains passenger lymphocytes?

The lymphoid tissues of the intestinal tract are collectively referred to as ________.