Bangladesh has launched an emergency MMR vaccine campaign after health data confirmed at least 130 children dead from measles in the past six weeks. The outbreak signals a collapse in vaccination coverage — measles deaths at this scale in a country with an established health infrastructure indicate that a significant portion of children were not reaching the immune status the MMR vaccine provides.

The causes of such gaps are usually layered: supply chain disruptions, displacement, community resistance, or simply the erosion of routine immunization programs during periods of economic pressure. Bangladesh has dealt with all of these in recent years.