A vaccine is used to create artificial active immunity. After being given a vaccine, it will take a period of time before a person develops long-term immunity against the disease.
Which statement about this period of time explains this delay?
No memory cells have been produced from B-lymphocytes.
2 )
No plasma cells have been produced from B-lymphocytes.
3 )
The primary immune response has not produced enough antibodies.
4 )
The secondary immune response has not produced enough antibodies.
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