There have been recent outbreaks of vaccine-preventable diseases in the United States, due to the anti-vaccination movement.
 
Here is a short (but very important) article on why vaccination is necessary, and why not vaccinating your children can be harmful to them, and to other people around them.
 
The article links you to scientific papers, and encourages you to examine the evidence on your own, in order to arrive at a more informed decision.
 
“You owe it to your children, and to yourself, to thoroughly investigate the issue.” – Jennifer Raff (article author)
 
'Dear Parents, you are being lied to.' (violentmetaphors.com)