This has been one of the worst years for measles outbreaks in more than a decade.
Public health officials attribute that largely to people who refuse to vaccinate their children.
Measles is highly contagious and can be deadly. It has been mostly eliminated in this country because of the vaccine. Still, doctors see an average of 60 cases a year.
However this year, three outbreaks in this country have lead to 159 cases. All are now considered contained.
The largest outbreak was in New York City, with 58 cases, 23 were reported in North Carolina, along with 21 in Texas.
Nearly all of the patients had not been vaccinated. Most had objected to getting the vaccine for personal or philosophical reasons.