Measles is a contagious viral disease marked by the eruption of red circular spots on the skin. There were 131 reported cases of measles in the United States in 2008, over three times as many as in 2007. The Center for Disease Control blames this on an unfounded fears that the vaccination can be linked to health problems, such as autism. The CDC says most new cases of measles are in home schooled children who are not required to have the MMR (measles, mumps and rubella) vaccine, and among children whose parents do not have them vaccinated for religious reasons.  In recent years, the number of measles cases in the United States has increased, allegedly due to increased travel to and from countries where vaccination is not widespread. 
In 2013, the Center for Disease Control announced that measles outbreaks were increasing, almost entirely among people who were not properly vaccinated.