During a mumps outbreak at a local school, a teacher has been exposed. the client has previously been immunized for mumps, and consequently possesses acquired immunity.
Acquired (adaptive or specific) immunity is not present at birth. It is learned. When a person's immune system comes into contact with foreign invaders and detects nonself substances, the learning process begins (antigens). The components of acquired immunity then discover the most effective strategy for combating each antigen and start to form a memory for that antigen. Specific immunity is another name for acquired immunity. Lymphocytes are the white blood cells that provide innate immunity (T cells and B cells).
After being exposed to a novel antigen for the first time, acquired immunity takes time to develop. However, subsequent reactions to the antigen are quicker and more efficient than those that followed the initial exposure because the antigen is recalled.
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