Question

After vaccination, the body builds up
A. Toxins
B. Lymph
C. Antibodies
D. Plasma

Answer 1

Hint: Vaccines are used for providing immunity to the host. Immunity can be of two types- active and passive. Active immunity is that which is developed by the host body itself whereas passive immunity is the one that is provided by external aids.

Complete answer:
Vaccines are examples of passive immunity. After vaccination, the body builds up antibodies. Antibodies are the chemicals produced by the body in response to antigens (foreign matter). Vaccines trigger the body’s immune system to produce antibodies against these antigens.
Vaccines are of the following types:
-Dead/inactivated – The vaccine contains dead microorganisms which when introduced into the body produces an immune response.
-Live attenuated- In this type of vaccine, the microorganisms are infested live into the body but in a deactivated form.
-Toxoid vaccine – In this type, only the toxin of the microorganism is inserted into the body and the body develops antibodies against the organism.
-Recombinant vaccine- This type of vaccine is created using recombinant DNA technology. Through RDT, the disease causing sequence is removed from the DNA and the recombinant organism is inserted into the host. This prevents the disease in the host and also creates antibodies against the organism.
Hence, the correct answer is option (C).

Note: Mother’s milk is another example of passive immunity. The passive immunity lasts longer than the active one. Passive immunity takes longer to develop but is effective for a longer time. This property is due to the memory B cells which remember an infection and do not allow recurring infections.