Bangladesh is currently experiencing a significant and alarming increase in measles cases across the nation. Health authorities have reported tens of thousands of suspected infections and hundreds of deaths, marking a dramatic escalation compared to previous years. This surge underscores pressing challenges in vaccination efforts and public health response, particularly for children and vulnerable communities. Since mid-March 2026, the country has recorded a cumulative total of 41,793 suspected measles cases, with 1,302 new cases emerging in just the most recent 24-hour reporting period. Over the same timeframe, there have been 5,567 laboratory-confirmed cases of measles and 28,842 hospital admissions due to the disease. Tragically, 253 suspected measles-related deaths have been reported nationally, including six fatalities in the latest 24 hours. ## Understanding Measles: A Highly Contagious Threat Measles is a serious and highly contagious viral illness that can lead to severe complications. It spreads through the air when an infected person coughs or sneezes, making it one of the most infectious diseases known. Initial symptoms often resemble a common cold, including fever, runny nose, cough, and red, watery eyes. A characteristic rash typically appears a few days later, starting on the face and spreading down the body. While often considered a childhood disease, measles can affect people of all ages if they are not immune. Complications can be severe, ranging from ear infections and diarrhea to pneumonia, encephalitis (brain inflammation), and even death. Young children, especially those under five, and individuals with weakened immune systems are at the highest risk for severe illness and complications. The only effective protection against measles is vaccination. ## The Scale of the Outbreak: An Unprecedented Escalation The current outbreak represents an unprecedented escalation in Bangladesh. In the five years prior to this surge, the country typically saw fewer than 280 confirmed measles cases annually. Now, the number of confirmed cases has skyrocketed to over 5,400 in just a few months, with more than 1,300 new cases reported daily, a stark contrast to the 125 annual cases recorded in 2025. This dramatic increase signals widespread transmission and places immense pressure on an already strained healthcare system. Several divisions are bearing a significant burden. Dhaka Division, the nation's capital and most populous region, reports the highest cumulative numbers with 18,975 cases and 34 confirmed deaths. Substantial case numbers are also being reported from the Rajshahi and Chattogram divisions, indicating a broad geographic spread of the disease. ## Vaccination Gaps: Fueling the Outbreak The root cause of this widespread outbreak is a substantial gap in vaccination coverage. According to the latest available data from 2023, national coverage for the first dose of the measles-rubella (MR) vaccine stood at 86.1%, while the second dose reached 80.7%. While these figures might seem relatively high, they fall short of the 95% coverage needed to achieve 'herd immunity,' a critical threshold that protects entire communities, including those who cannot be vaccinated (such as infants or people with certain medical conditions). When vaccination rates drop below this level, accumulated susceptible individuals across several birth years create a large pool for the virus to spread. To combat the surge, the government launched an ambitious nationwide MR vaccination campaign targeting 99.25% coverage. However, current administrative coverage has only reached 60.57%. This significant shortfall means millions of children remain unprotected and vulnerable to infection. Recognising this challenge, the government has extended the campaign's end date from May 10–12, 2026, to May 20, 2026, allowing crucial additional time for catch-up activities. ## Targeted Efforts for High-Risk Areas Compounding the national challenge are several districts reporting particularly low vaccination coverage, with less than 50% of their target populations reached. These critical areas include Brahmanbaria (37.13%), Manikganj (38.27%), Noakhali (39.99%), Chattogram District (41.61%), Faridpur (46.63%), Habiganj (47.24%), and Joypurhat (47.24%). In response, the government's Expanded Programme on Immunization (EPI) has specifically requested the Bangladesh Red Crescent Society (BDRCS) to intensify its volunteer support in these underperforming districts. The focus is on strengthening community mobilisation, expanding outreach to hard-to-reach locations, and improving local-level coordination. These efforts are crucial to boost coverage during the extended campaign period and protect the most vulnerable children. ## The Unique Challenge in Rohingya Refugee Camps The measles outbreak also presents a severe challenge within the densely populated Rohingya refugee camps in Cox's Bazar. As of late April 2026, 331 suspected measles cases have been reported in the camps, with confirmed outbreaks escalating from two to eight different camps. The annualised measles incidence in the camps has dramatically risen to 150.9 cases per million population, a substantial increase from just 5.10 cases per million in the previous year. Data from the camps show a sharp rise in measles consultations during April 2026, indicating intensified transmission. Children under five years old account for 61% of laboratory-confirmed cases, including a notable 22% among infants younger than nine months. Alarmingly, 37% of cases occurred in children aged 5–15 years, suggesting that susceptibility to measles extends beyond the typical younger age groups. Vaccination status data reveal that 83% of confirmed cases in the camps were either unvaccinated or had received only a single dose of the measles vaccine, highlighting persistent immunity gaps that continue to fuel transmission in these high-density settings. Transmission patterns within the camps are consistent with rapid person-to-person spread, particularly intense in camps 2E, 3, and 17, which have experienced the highest attack rates. Addressing these immunity gaps through robust vaccination efforts is paramount to curbing the spread and protecting this highly vulnerable population. ## Looking Ahead: A Collective Effort for Health Security The ongoing measles surge in Bangladesh serves as a critical reminder of the importance of maintaining high vaccination coverage. The government, supported by partners like the Red Crescent, is working tirelessly to extend vaccination outreach and educate communities on the life-saving benefits of immunization. Success in this extended campaign hinges on strong community participation, effective mobilisation in low-performing areas, and sustained efforts to reach every child. Achieving the 95% herd immunity threshold is not merely a target; it is a necessity for protecting the health security of the entire nation, especially its children. Continued vigilance, strengthened surveillance, and consistent vaccination drives are essential to prevent future outbreaks and ensure a healthier future for Bangladesh.