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Immunity and vaccination
Concepts tested here
- Active and passive immunity
All Questions
2011 AIPMT-MAINS 1 question
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Select the correct statement with respect to diseases and immunisation.Antibodies are produced by B-lymphocytes (which form plasma cells), and T-lymphocytes (helper T-cells) help the B-cells to produce them. If both B- and T-lymphocytes are damaged, no antibodies will be produced against a pathogen. This statement is correct.
Hepatitis B vaccine is produced by recombinant DNA technology in yeast, which is a fungus, not a protozoan.
Snake antivenom contains preformed antibodies, so its injection is passive immunisation, not active.
Injection of dead or inactivated pathogens (vaccination) makes the body produce its own antibodies and memory cells, which is active immunity, not passive.
Hence the correct statement is the one about damage to B- and T-lymphocytes.