<span>E. Stimulation of T-cell by APC</span>
The initial exposure of the body to an infectious agent e.g. through a vaccine, triggers an immune response most of which rapidly diminishes after the vaccination. However some cells of the immune system called lymphocytes remain with a memory of that pathogen.As a result, if the same pathogen infects a vaccinated person, the memory cells remember and recognize it and rapidly spring into action triggering a much more rapid response specific to that pathogen than the initial exposure, effectively dealing and neutralizing the pathogen.
It is potential energy is converted into apt energy for use in living things.
I believe it is number 3.
Hope this helps!
update >:(
never mind. after an hour of work in the hopes of some points, a moderator deleted my answer. how fun for me.
in all honesty i understand why though
