[DK615617]

I read an article today on Yahoo news and it got me thinking.
I am just curious about something. I know this might be a little dumb on my behalf, but I don't understand why people say that by people not immunizing there kids that they are putting everyone at risk. If everyone else has the vaccines how can this be true? Wouldn't only newborns be at risk?? ( And those who chose not to be immunized?) If that is the case and someone not giving there kids the vaccines can cause the vaccinated people to get the disease anyway then why get the vaccine if it isn't going to do its job?
I know I am probably just missing something here. But I have always wondered. You hear people say that the people who don't get vaccines are putting everyone at risk, so how is that?
And if you wouldn't want your kids to play with kids because they didn't get the shots and yours did, why is that? Don't you have faith in the shots?
Just a few questions that I have always wondered but never wanted to offend anyone.
Please don't take offense, I am just curious....
(also I am not anti vaccine, just really scared of them. And on a slightly slower schedule for them)