When Antigens Are Administered to Individuals to Produce Immunity, Why

question 4

Multiple Choice

When antigens are administered to individuals to produce immunity, why are different routes of administration used (e.g., some are given intravenously, whereas others are given subcutaneously or nasally) ?

• A)Different routes allow the speed of onset of the antigen to be varied, with the intravenous route being the fastest.
• B)Some individuals appear to be unable to respond to an antigen by a specific route, thus requiring the availability of different routes for the same antigen.
• C)Antigen-presenting cells are highly specialized and thus require stimulation by different routes.
• D)Each route stimulates a different lymphocyte-containing tissue resulting in different types of cellular and humoral immunity.

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