In the United States many of the diseases vaccinated for are nearly absent in communities now. Some diseases may even be eradicated completely by the use of immunizations, as with the case of smallpox in 1977. (Kee, Hayes, McCuistion, 2012, p. 502) A low incidence in many of the vaccine-prevented diseases can lead some to a false sense of security against the risk of contracting such diseases. It is important for the general population to continue receiving vaccinations. An article in The New England Journal of Medicine points out "High vaccine coverage, particularly at the community level, is extremely important for children who cannot be vaccinated, including children who have medical contraindications to vaccination and those who are too young to be vaccinated. These groups are often more susceptible to the complications of infectious diseases than the general population of children and depend on the protection provided by the vaccination of children in their environs."
Many parents think there is no longer a risk of their child contracting the disease or even becoming exposed to them at all. The refusal of a few to vaccine may not have much of an impact on society, however, the refusal of many to not vaccinate in a community can have disastrous consequences. If the immunization level of a population drops too low,