Figure 45-1 ​ ​

Multiple Choice

Figure 45-1 ​

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Based on the accompanying graph, which statement is accurate?

A) The primary response to the initial injection subsides after seven weeks.
B) The primary response to the initial injection peaks at 10² antibody units.
C) The primary response to the initial injection is faster, but not as intense as the secondary response.
D) The secondary response to the initial antigen is both faster and more intense than the primary response.
E) The primary and secondary responses to the initial antigen are about equal.