The federal Centers for Disease Control and Prevention has reported that measles cases between Jan. 1 and May 19, 2011 came to 118 - the highest total for that time period since 1996.

No deaths resulted, although 40 percent of the 118 were hospitalized.

Most of the cases (89 percent) were associated with travel to another country or exposure to someone who had traveled outside the U.S. The agency said that 105 of the 118 measles cases, 89 percent, were in people who had not been vaccinated against the disease.