"Much of the touted "success" of vaccines relies on correlation, not true causation. For example, during the time that the polio vaccine was introduced, major changes were happening in the sanitation of this country."
This is the party line as far as antivaxers are concerned, but it is ridiculous to claim that the dramatic reductions in incidence of these diseases are just due to "sanitation". Take polio for instance.
The first major outbreak of polio in the U.S. was in 1916. Outbreaks increased in following years. The worst polio epidemic in U.S. history occurred in 1952 - close to 58,000 cases, with more than 20,000 cases of paralytic polio. Parents lived in fear that their children would get sick and wind up in iron lungs, unable to breathe on their own, or die. Sanitation improved between 1916 and 1952 - but that did not help beat polio).
Then Salk's polio vaccine came on the scene in 1955, and the results were dramatic. By 1957, polio cases dropped 85-90%. Was there some revolution in sanitation in just a couple years that could have accounted for this? Nonsense. Today there are something like 1000 cases of polio a year worldwide. That's thanks to polio vaccines.
http://www.cdc.gov/vaccines/events/polio-vacc-50th/timeline.htm
"vaccination isn't about rainbows & ponies & cotton candy"
No, it's about saving lives.
"Before vaccines, parents in the United States could expect that every year:
Polio would paralyze 10,000 children.
Rubella (German measles) would cause birth defects and mental retardation in as many as 20,000 newborns.
Measles would infect about 4 million children, killing 3,000.
Diphtheria would be one of the most common causes of death in school-aged children.
A bacterium called Haemophilus influenzae type b (Hib) would cause meningitis in 15,000 children, leaving many with permanent brain damage.
Pertussis (whooping cough) would kill thousands of infants."
http://www.chop.edu/consumer/jsp/microsite/microsite.jsp?id=75918
Antivaxers need to stop living in their dreamworld of misinformation and obsessive hatred towards vaccines, and start being concerned about the potential for us to backslide to the days of widespread diseases which are now preventable, thanks to immunization.