Almost 900 people in Bangladesh are believed to have died from a measles outbreak that started in March 2026. Most of those affected are children, who are especially vulnerable to the highly contagious disease. Measles spreads easily through the air when an infected person coughs or sneezes, and it can remain infectious in the air for hours. The outbreak highlights how a decline in vaccination rates over time can lead to serious public health crises. Bangladesh had aimed to eliminate measles and rubella by 2020, but the pandemic disrupted routine childhood vaccinations, leaving many children unprotected. Vaccine hesitancy, which grew during the pandemic, may have also contributed to the current situation. Many parents in Bangladesh were wary of vaccines during the pandemic, and this reluctance may have extended to the measles-rubella vaccine. Factors like poverty, education levels, and access to prenatal care also influence vaccination rates, and these have been declining for years, with coverage now at 87%. Between March 15 and September 6, 2026, Bangladesh reported 92 suspected measles cases and 11 confirmed cases per 100,000 people, based on an estimated population of 178 million. In response, the country launched an emergency vaccination campaign targeting children aged six months to five years, with special provisions for infants aged six to eight months. The World Health Organization recommended an additional dose for all children in the target group, regardless of prior vaccination, to build a strong barrier against the disease. The vaccination campaign began in early April in 30 sub-districts across 18 priority districts and expanded nationwide later in the month. This was the first national measles campaign since 2020. Alongside vaccination, children with suspected or confirmed measles received vitamin A, a treatment that reduces the risk of severe illness and death. Health authorities also activated rapid response teams, increased isolation beds in hospitals, and issued new guidelines for managing the outbreak. International organizations like UNICEF, the WHO, and Gavi supported the efforts, while local groups raised awareness to encourage families to bring their children for vaccination. Despite these efforts, challenges remain. If routine booster shots are missed, or if large gatherings continue, the disease could spread again. Measles requires high vaccination coverage—around 95% of a population—to achieve herd immunity, where enough people are immune to prevent outbreaks. Even a small drop in vaccination rates can leave vulnerable pockets of children at risk. Bangladesh's experience shows how these gaps can grow over time and lead to serious outbreaks. The country’s response highlights the importance of sustained vaccination efforts, strong health systems, and community trust in preventing future crises.