United Nations says last year's 870,000 measles cases were most in 23 years
To prevent outbreaks, WHO estimates 95% of the population must be immunized -- coverage has stalled between about 70% and 85% globally. |!| Portland
To prevent outbreaks, WHO estimates 95% of the population must be immunized -- coverage has stalled between about 70% and 85% globally. |!| Portland