New Delhi, April 7 -- Bangladesh is conducting emergency measles-rubella vaccinations while trying to contain an ongoing outbreak that has killed more than 100 children in less than a month.

The government in partnership with the World Health Organization, the U.N. children's agency and the Gavi vaccine alliance began working to vaccinate children age 6 months to 5 years old in 18 high-risk districts Sunday and will expand nationwide in phases from next month, a joint statement said.

A UNICEF official said the agency was deeply concerned about the sharp rise in cases, which was putting the youngest and most vulnerable children at serious risk. "This resurgence highlights critical immunity gaps, particularly among zero-dose and under-vac...