After decades of progress against one of the most contagious human viruses, the world is seeing measles stage a slow, steady comeback.
The World Health Organization and the CDC say in a new report that there were nearly 10 million cases of measles last year, with outbreaks on every continent.
An estimated 140,000 people died from measles in 2018, WHO says, up from an all-time low of 90,000 in 2016.
And so far 2019 has been even worse.