Thirteen-month-old Jannat cries as her mother Sohana, a garment worker, tries to feed her. The child is hospitalized for measles at DNCC Hospital in Dhaka, Bangladesh.

The number of cases — and deaths — in Bangladesh is staggering. As of Sunday, 528 have died, mostly children. How did this measles outbreak begin? And how is the country responding?

(Image credit: Anike Rahman for NPR)