## Measles Resurgence in Bangladesh: A Nationwide Health Challenge Bangladesh is currently facing a serious and widespread measles outbreak, with health officials working tirelessly to contain the highly contagious disease. The World Health Organization (WHO) was officially notified on April 4, 2026, about a rapid increase in measles cases across the country. This health crisis has impacted nearly all regions, touching 58 out of Bangladesh's 64 districts and all eight divisions, indicating a broad national spread of the virus. Between mid-March and mid-April 2026, a concerning number of infections were reported: over 19,000 suspected measles cases and close to 3,000 confirmed through laboratory tests. Tragically, 166 suspected measles-related deaths were also recorded during this period, highlighting the severe impact of the disease. A stark statistic reveals that the vast majority, about 79%, of those affected are children under the age of five, with a significant proportion being infants under two years old. Hotspots for the outbreak include densely populated urban areas like Dhaka, Rajshahi, Chattogram, and Khulna, with many cases concentrated in informal settlements and slum clusters in Dhaka. ## Understanding Measles: A Highly Contagious Threat Measles is a severe illness caused by a virus, known for its extreme contagiousness. It spreads easily through the air when an infected person coughs or sneezes, releasing tiny droplets containing the virus. Symptoms typically appear about 10 to 14 days after exposure and include a high fever, runny nose, red and watery eyes, a persistent cough, and characteristic tiny white spots that appear inside the mouth (Koplik's spots). A red, blotchy rash usually develops a few days later, starting on the face and spreading down the body. While often seen as a childhood illness, measles can affect individuals of any age who are not immune. Most people recover within a few weeks, but it can lead to dangerous complications, particularly in young children, those who are malnourished, and individuals with weakened immune systems. These complications include severe pneumonia, persistent diarrhea, ear infections, and, more rarely, inflammation of the brain (encephalitis), which can result in brain damage, blindness, or even death. The fatality rate can be around two to three deaths for every 1000 reported cases, underscoring the seriousness of the disease. ## Bangladesh's Urgent Public Health Response In response to the escalating crisis, Bangladesh's health authorities have swiftly implemented a comprehensive public health strategy. A critical measure has been the launch of a nationwide measles-rubella (MR) vaccination campaign. This campaign, approved on March 30, 2026, began in early April in priority districts and expanded nationwide on April 20, targeting children aged 6 to 59 months, with a specific focus on those 6 to 8 months old who might be particularly vulnerable. Beyond vaccination, the government is also providing Vitamin A supplements to all suspected and confirmed measles patients. Vitamin A is crucial for immune function and can help reduce the severity and complications of measles. District-level Rapid Response Teams have been activated to quickly investigate and manage new cases. Other key actions include fast-tracking vaccine procurement, enhancing the capacity of hospitals to manage measles patients, ensuring adequate isolation facilities, and reinforcing infection prevention and control measures in healthcare settings. Strengthening surveillance is another vital component of the response. This involves improving how cases are detected and reported across the country, conducting training for health facility staff, and producing weekly situation reports to guide decision-making. National and divisional guidelines have been issued to standardize clinical management, patient care pathways, and procurement processes, ensuring a coordinated effort against the outbreak. ## Unpacking the Causes: Immunity Gaps and Vulnerability This current measles outbreak in Bangladesh is largely attributed to existing gaps in population immunity. While Bangladesh had made significant strides towards measles elimination in previous years, achieving high vaccination coverage with both first and second doses of the measles-containing vaccine, recent challenges have reversed some of these gains. A substantial number of cases are occurring among children who have either not been vaccinated or have only received a single dose, indicating incomplete protection. Furthermore, many infants are contracting the virus before they reach the recommended age for vaccination. A critical factor contributing to these immunity gaps was a nationwide shortage of MR vaccines between 2024 and 2025. This stockout, combined with general disruptions in routine immunization services and the absence of regular mass measles-rubella campaigns since 2020, significantly increased the number of children susceptible to the disease. The current outbreak serves as a stark reminder of how fragile immunization progress can be and the importance of sustained, high-quality vaccination programs. ## Assessing the Risks: National, Regional, and Global Concerns The World Health Organization assesses the risk of this measles outbreak at the national level as high. This assessment is based on several factors: the ongoing transmission across numerous divisions, the large pool of susceptible children, documented gaps in immunity, and the occurrence of measles-related deaths. The concentration of cases among unvaccinated and under-vaccinated children, including infants too young for routine vaccination, raises serious concerns about continued, uninterrupted transmission and severe disease outcomes. Regionally, the risk is also considered high. Measles is endemic across the South-East Asia region, and Bangladesh shares extensive land borders with India and Myanmar. Population movement across these borders can facilitate the cross-border spread of the virus, especially given the significant number of unvaccinated children in Myanmar, where conflict and humanitarian crises limit surveillance and response capabilities. Even India, despite generally high vaccination coverage, has seen a recent rise in measles cases. Major urban centers and transit hubs within Bangladesh, such as Dhaka and Chattogram, further increase the likelihood of national and international spread, particularly among unvaccinated travelers. Globally, the risk is moderate, driven by high levels of population mobility, widespread measles transmission in various parts of the world, and persistent immunity gaps. This interconnectedness means that an outbreak in one region can quickly become a concern for others, underscoring the need for robust global surveillance and immunization efforts. ## WHO's Recommendations for Control and Prevention To effectively combat measles, the WHO provides several key recommendations. Paramount among these is maintaining consistently high vaccination coverage – at least 95% for both the first and second doses of the measles-containing vaccine across all areas. This robust coverage is essential for achieving herd immunity, which protects the entire community, including those too young or medically unable to be vaccinated. Strengthening integrated surveillance for measles and rubella is also crucial. This ensures that all suspected cases are detected and reported promptly across public, private, and social security healthcare facilities. Special attention should be paid to high-traffic border areas, where surveillance needs to be particularly strong to rapidly identify and respond to imported cases, preventing them from re-establishing local transmission. Rapid response teams, trained for this purpose, should be activated swiftly when imported cases are detected, with continuous coordination and clear communication channels between national, sub-national, and local levels. Effective hospital case management is vital during outbreaks to prevent the virus from spreading within healthcare facilities. This includes ensuring appropriate referral of patients to isolation rooms and minimizing contact with other patients in waiting areas. Furthermore, the WHO recommends vaccinating at-risk populations who lack proof of vaccination or immunity. This includes healthcare workers, individuals in tourism and transportation sectors (hotels, airports, border crossings), and international travelers. Implementing immunization plans for migrant populations in border areas, prioritizing both migrants and residents, can significantly boost population immunity. For susceptible contacts of measles cases, post-exposure prophylaxis (PEP) should be considered. This typically involves administering a dose of the measles-containing vaccine (if given within three days of exposure) or, for those at higher risk or where the vaccine is contraindicated, normal human immunoglobulin (NHIG) up to six days post-exposure. Infants, pregnant women, and immunocompromised individuals should be prioritized for PEP. Finally, countries should maintain adequate stocks of MR/MMR vaccines and related supplies to facilitate rapid control actions. The WHO does not recommend any travel or trade restrictions based on the current outbreak information. This comprehensive approach is essential to control the current outbreak and safeguard public health against future measles resurgences.