Bangladesh’s Measles Outbreak: Why Hospitals Are Overwhelmed and Children Are Most at Risk

Several factors are driving the strain on the health system:

• Rapid surge in cases: Tens of thousands of infections have been reported within a matter of weeks.
• Severe illness in young children: Young patients often require closer monitoring, oxygen, or hospital care.
• Existing health‑system pressures: Many hospitals already operate with limited resources, especially in densely populated or low‑income areas.

The combination of high transmission and vulnerable pediatric patients has produced a sudden wave of hospitalizations nationwide.

Most infections are in children under five

Young children account for the overwhelming majority of cases. International and academic analyses estimate that roughly 72% to more than 80% of reported infections are in children under five years old.

Infants younger than nine months are particularly vulnerable. Many have not yet reached the age when routine measles vaccination normally begins, leaving them exposed to severe complications such as pneumonia or encephalitis.

Emergency vaccination campaign

To slow transmission, the Bangladesh government launched an emergency measles‑rubella vaccination campaign on 5 April 2026 in partnership with the World Health Organization (WHO), UNICEF, and the Gavi vaccine alliance.

The campaign rolled out in phases:

• Initial vaccination in high‑risk districts and selected upazilas.
• Expansion to major city corporations.
• Nationwide rollout beginning in early May.

The program targets children aged 6 months to 5 years, including those who missed routine immunization.

By May, the campaign had vaccinated more than 18 million children nationwide, and over 166,000 children in Rohingya refugee camps in Cox’s Bazar had also been immunized.

How gaps in routine immunization fueled the crisis

Public‑health experts say the outbreak reflects gaps in routine vaccination coverage. Over time, immunization rates have slipped slightly, leaving a larger group of susceptible children.

For example, one analysis found measles‑rubella first‑dose coverage declined from about 88.6% in 2019 to around 86% in 2024, while second‑dose coverage fell to about 80.7%, leaving millions of children vulnerable.

Case investigations also show many infected children had not been fully vaccinated. A large proportion were either “zero‑dose” children who had never received a measles vaccine or had only partial protection, which allowed the virus to spread quickly once transmission began.

Concerns about wider regional spread

Measles is one of the most contagious infectious diseases, capable of spreading rapidly in populations with immunity gaps. With tens of thousands of infections reported and ongoing transmission across much of the country, public‑health agencies warn that the outbreak could continue expanding if vaccination coverage is not rapidly increased.

The risk is heightened in crowded settings—such as densely populated cities and refugee camps—where outbreaks can spread quickly and potentially cross borders if not controlled.

What happens next

Health officials are focusing on mass vaccination, improved surveillance, and expanded hospital preparedness to slow the outbreak. The speed of the emergency campaign has already reached tens of millions of children, but experts say sustained routine immunization will be essential to prevent similar crises in the future.

For now, Bangladesh’s measles surge illustrates how quickly the virus can resurface when vaccination coverage dips—even in countries that previously made strong progress toward eliminating the disease.