If vaccination really works, then it's only the unvaccinated that will be affected.
PS: A fire resistant couch save lives dispute the fact they can still burn in a hot enough fire, the benefit is focused on small ignition sources aka a spark or cigarette not a kiln.
EX: Just the M in MMR prevents ~1/2 million people from getting sick each and every year. The benefit of measles vaccination in preventing illness, disability, and death has been well-documented. The first 20 years of licensed measles vaccination in the U.S. prevented an estimated 52 million cases of the disease, 17,400 cases of mental retardation, and 5,200 deaths.[10] During 1999–2004, a strategy led by the World Health Organization and UNICEF led to improvements in measles vaccination coverage that averted an estimated 1.4 million measles deaths worldwide.[11]
http://en.wikipedia.org/wiki/File:Measles_US_1944-2007_inset...
Vaccinations prevent well over 50,000 deaths per year in the US alone along with a large number of vary serious side effects. On an individual basis the lifetime chance of infection is still higher than you might think and only increases as more people avoid vaccination. If we where talking about an adult taking the risks for themselves that's one things, but we are talking about making the choice for someone else as well increasing the overall risk to society.