The number of measles cases reported in the United States has risen to 839, according to the U.S. Centers for Disease Control and Prevention.
That’s up from 764 cases reported last week, when officials said the outbreak had reached a level not seen in the U.S. in 25 years.
Measles outbreaks up in 2019
Reported cases of measles, 2010-2019.
* Cases as of December 29, 2018;
** Cases as of May 10, 2019.