Dont die from infect
Vaccines help prevent getting infected with illnesses that can seriously harm you or kill you.
Think of it this way... A child born in 2011 has a risk of death by age 5 is one in several thousand. A child born in 1911 had a risk of death by 5 of 1 in 5! yes 20% chance. Much of that difference is due to decrease in vaccine preventable diseases. I would call that important.