In large part, thanks to widespread immunization, the number of young children dying each year has declined significantly, from approximately 14 million in 1979 to slightly less than eight million in 2010.
approximately child decline
Seth Berkley
These are some quotes by American author Seth Berkley Scientist.
Quotes by Seth Berkley
Now, when you get a viral infection, what normally happens is it takes days or weeks for your body to fight back at full strength, and that might be too late. When you're pre-immunized, what happens is you have forces in your body pre-trained to recognize and defeat specific foes. So that's really how vaccines work.
