Question 9
How do vaccinations prepare the body's immune system to fight invasions of a specific pathogen?
a
by directing the immune system to produce more of all pathogens
b
by directing the immune system to produce antibodies to fight all pathogens
c
by directing the immune system to produce more white and red blood cells, which will fight the specific pathogen
d
by directing the immune system to produce antibodies to fight that specific pathogen