Acquired Immunity mediated by which of the following
Antibody formation by $T$ - lymphocytes
Antibody formation by $B$ - lymphocytes
$HCl$ by stomach
Bite by snake
What are pathogens ?
Which of the following is a pentameric immunoglobulin and is produced first in a primary response to an antigen?
The term ’active immunity' means
An autoimmune disease is
Some people who have suffered from a disease may not be affected again during their life time; such immunity is called