870,000 measles cases in 2019, highest number in 23 years, United Nation says
To prevent outbreaks, WHO estimates about 95 percent of the population must be immunized -- coverage has stalled between about 70 percent and 85 percent globally.
To prevent outbreaks, WHO estimates about 95 percent of the population must be immunized -- coverage has stalled between about 70 percent and 85 percent globally.