New Delhi, June 29 -- DHAKA - More than half the children killed by measles in Bangladesh this year were not yet old enough to have finished their vaccination schedule.

That detail - 66 percent of cases in children under two, 33 percent in infants under nine months - sits at the center of a public health emergency that has killed 519 people with suspected measles symptoms since mid-March, with 91 deaths confirmed by laboratory testing. The total case count as of June 5 stood at 76,876 suspected infections and 9,503 confirmed cases, spread across 58 of Bangladesh's 64 districts. The WHO's Disease Outbreak report documenting the progression describes it as the worst measles outbreak Bangladesh has seen since 2005.

Bangladesh notified the ...