Which statement concerning the defence in the body against infectious disease is not correct?
Antibodies against specific antigens are produced by plasma cells in passive immunity, but the protection is short-lived as no memory cells are produced.
2 )
A specific immune response involves activation of B-lymphocytes and T-lymphocytes following recognition of, and binding to, a specific antigen.
3 )
Following invasion by microorganisms, natural active immunity can be gained by initiating an immune response.
4 )
Lysosomes fuse with vacuoles that have been formed by phagocytes and which contain invading microorganisms.
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