How long after initiation of a primary response do significant amounts of antibody appear in the blood?

Question

Quizplus · Accepted Answer

It takes 10-14 days after initiation of a primary response for significant amounts of antibody to appear in the blood. During this time, B cells are activated, undergo clonal selection and proliferation, and differentiate into plasma cells which secrete antibodies. The antibodies first appear in the blood and then later, in other body fluids.

How Long After Initiation of a Primary Response Do Significant