NEET BIOLOGY

Detailed explanation-1: -After immunization, dendritic cells take up microbial antigens and traffic to draining lymph nodes where they present processed antigens to naïve T cells. These naïve T cells are stimulated to proliferate and differentiate into effector and memory T cells.

Detailed explanation-2: -The bacteria or virus will be killed, greatly weakened, or broken down into small parts before use in the vaccine so that they can trigger an immune response without making you sick. Your immune system will still attack the harmless form of bacteria or virus from the vaccine and will produce antibodies to fight it off.

Detailed explanation-3: -Vaccinations take advantage of memory lymphocyte development by artificially-generating active immunity, a process called immunization. During a vaccination, the antigen of a pathogen is introduced into the body and stimulates the immune system to develop a specific immunity against that pathogen.

Detailed explanation-4: -To trigger an immune response, many vaccines put a weakened or inactivated germ into our bodies. Not mRNA vaccines. Instead, mRNA vaccines use mRNA created in a laboratory to teach our cells how to make a protein-or even just a piece of a protein-that triggers an immune response inside our bodies.