Myasthenia gravis is due to
When an organ is transplanted and is rejected by the body, the lymphocytes are produced by
Antivenom injection contains preformed antibodies while polio drops that are administered into the body contain
What are recombinant $DNA$ vaccines ? Give two examples of such vaccines. Discuss their advantages.
Many microbial pathogens enter the gut of humans along with food. What are the preventive barriers to protect the body from such pathogens ? What type of immunity do you observe in this case ?