How many people died from measles in 2018
In 2018, an estimated 140,000 people died from measles globally, according to World Health Organization (WHO) and Centers for Disease Control and Prevention (CDC) assessments. The vast majority of these deaths occurred in children under 5 years old, with low vaccination coverage and gaps in outbreak response contributing to the toll. Compared with 2017, deaths declined from an estimated 110,000 to 140,000 upward revision reflecting improved modeling; yet the year underscored persistent vulnerabilities in routine immunization systems worldwide.
Global estimates and methodology
Because measles deaths are not always clinically confirmed at death, WHO and CDC use modeled estimates based on serologic surveys, vaccine coverage data, and surveillance metrics. These estimates are revised periodically as new data and methods become available. The 2018 figures reflect updated methods that better account for demographic shifts and surveillance improvements, offering a more accurate baseline for public health planning.
Regional breakdown of measles deaths in 2018
The burden of measles in 2018 was highly concentrated in regions with weak health systems and low vaccine uptake. High-income regions with strong immunization programs reported very low numbers of measles deaths, whereas low- and middle-income countries accounted for the overwhelming majority of cases and fatalities.
| Region (2018) | Estimated measles deaths | Notes | Estimate | Source Type |
|---|---|
| African Region | ~74% of global estimates | WHO/UNICEF modeled estimates | Data not summed to 100% due to regional aggregation; percentages approximate |
| South-East Asia Region | ~16% of global estimates | WHO/UNICEF modeled estimates | Data not summed to 100% due to regional aggregation; percentages approximate |
| Eastern Mediterranean Region | ~6% of global estimates | WHO/UNICEF modeled estimates | Data not summed to 100% due to regional aggregation; percentages approximate |
| Americas | | Reported and modeled data |
| Eastern Europe/CIS | Small proportion but notable outbreaks | Increased coverage gaps observed in some subnational areas | Reported and modeled data |
| Western Pacific/Other regions | Minor proportion | Intermittent importation with localized spread | Reported and modeled data |
Why 2018 saw elevated risk despite historic declines
By 2018, global measles mortality had declined for many years thanks to widespread vaccination. However, stagnating and declining coverage in some countries led to large susceptible populations. Compounding factors included fragile health systems, conflict and displacement, and delays in outbreak response. These drivers created conditions in which even brief gaps in immunity could result in large, severe outbreaks with substantial mortality.
Measles severity and complications that lead to death
Measles itself is highly contagious, and severity rises in environments with delayed care, malnutrition, and weak immunity. Fatal outcomes are usually driven by complications rather than rash illness. Key complications that most commonly result in death include:
- Acute encephalitis: Swelling of the brain leading to neurologic damage or death.
- Severe pneumonia: Often bacterial superinfection with pathogens such as Streptococcus pneumoniae or respiratory viruses.
- Diarrheal disease and dehydration: Exacerbated by poor nutrition and limited access to care.
- Immune suppression: Measles temporarily impairs immune memory, increasing susceptibility to other infections.
These complications are especially severe in infants, young children, and people with underlying health conditions, underscoring why mortality is concentrated in the youngest and most vulnerable populations.
Vaccination as the primary prevention
Two doses of measles-containing vaccine are highly effective at preventing measles and death. In 2018, national immunization targets and outbreak responses relied on sustained high coverage to achieve population protection. Where routine coverage fell below the threshold needed to interrupt transmission, even localized under-vaccination could lead to outbreaks with serious outcomes. Strengthening primary care immunization systems and closing immunity gaps remained central to global strategies that year.
What changed in the years after 2018
Following 2018, global attention and financing increased, and many countries made strong gains in reducing measles mortality through catch-up campaigns and routine immunization improvements. However, disruptions caused by the COVID-19 pandemic subsequently reversed some progress, leading to renewed gaps in coverage and susceptibility. Understanding the 2018 context helps frame ongoing efforts to sustain high vaccine coverage and rapidly detect and respond to outbreaks.
Key takeaways
Measles deaths in 2018 were driven largely by inequities in vaccine access and health system strength rather than the intrinsic virulence of the virus alone. Concentrated in a few regions, these deaths were preventable with timely vaccination and outbreak control. Continued investment in routine immunization, surveillance, and rapid response remains essential to further reduce global measles mortality.