Twelve percent of children worldwide could not complete at least four years of schooling from 2019 to 2022. Sanitation and water gaps remain just as wide, with 2.4 billion people lacking safely managed sanitation and 1.9 billion lacking safely managed drinking-water services in 2022. Undercoverage compounds across sectors, from missed immunizations that followed COVID disruptions to healthcare coverage gaps linked to higher preventable mortality.
Key Takeaways
- 12% of children worldwide were unable to complete at least 4 years of schooling (2019–2022), reflecting global educational disadvantage that can drive undercoverage of essential services
- 1.4 billion people still lacked access to electricity in 2019 (World Bank data), indicating undercoverage of a foundational service
- 1 in 5 people (20%) in low- and middle-income countries were not covered by at least one essential health service in 2021, indicating undercoverage of health services
- Global Findex 2021 reports that account ownership is associated with improved resilience; the report quantifies percentages of adults using formal financial tools, linking financial undercoverage to economic risks
- In 2023, organizations with a fully deployed incident response plan reduced breach lifecycle by 12% (IBM), showing the cost effect of control coverage
- A 2020 systematic review reported that water quality interventions can reduce disease burden, implying avoided healthcare costs where water undercoverage exists (peer-reviewed study)
- Internet use is defined by ITU as “using the internet within the last 3 months” in household surveys, which determines who counts as digitally covered
- “Safely managed drinking-water” is defined as drinking water from an improved source that is “accessible on premises” and “free from contamination,” used to quantify water-service undercoverage
- COVID-19 disruptions caused an additional 9 million children to miss out on routine immunizations in 2021 (WHO/UNICEF estimates), worsening undercoverage
- Maternal mortality rises sharply where health-service coverage is low; the WHO estimates show maternal deaths are concentrated in countries with weaker coverage, implying undercoverage impact
- Lower “effective coverage” for essential health services is linked to higher preventable mortality; a 2017 Lancet study quantified strong association between coverage gaps and deaths
- The global market for identity and access management software was $17.5 billion in 2023, and poor IAM coverage can create undercoverage risks in access control
- The cybersecurity market size was $188.1 billion in 2023 (Gartner), showing the scale of tooling used to mitigate “coverage” gaps in security controls
- In 2024, 52% of organizations reported they lack visibility into all assets (Gartner survey), contributing to technology undercoverage in asset management
- 2.4 billion people lacked access to safely managed sanitation services in 2022
Nearly 1 in 5 people in low and middle income countries still lack essential health coverage, underscoring how education, water, sanitation, and cybersecurity gaps compound.
Related reading
01 · Category
Service Gaps4 stats
01
12% of children worldwide were unable to complete at least 4 years of schooling (2019–2022), reflecting global educational disadvantage that can drive undercoverage of essential services
02
1.4 billion people still lacked access to electricity in 2019 (World Bank data), indicating undercoverage of a foundational service
03
1 in 5 people (20%) in low- and middle-income countries were not covered by at least one essential health service in 2021, indicating undercoverage of health services
04
2.4 billion people still lacked adequate sanitation in 2020, indicating undercoverage of sanitation services
Interpretation
Service Gaps Interpretation
The service gaps are stark and persistent, with 12% of children unable to complete at least four years of schooling and 1.4 billion people still lacking electricity, alongside major health and sanitation shortfalls where 20% of people in low and middle-income countries are not covered by at least one essential health service and 2.4 billion lack adequate sanitation.
02 · Category
Cost Analysis5 stats
01
Global Findex 2021 reports that account ownership is associated with improved resilience; the report quantifies percentages of adults using formal financial tools, linking financial undercoverage to economic risks
02
In 2023, organizations with a fully deployed incident response plan reduced breach lifecycle by 12% (IBM), showing the cost effect of control coverage
03
A 2020 systematic review reported that water quality interventions can reduce disease burden, implying avoided healthcare costs where water undercoverage exists (peer-reviewed study)
04
UNICEF estimated that each additional 10% of routine immunization coverage could reduce child mortality, quantifying health-economic benefits from reducing undercoverage
05
A 2018 Lancet Global Health paper estimated that delays in childhood immunization contribute to substantial economic losses; it quantifies DALYs and associated costs (peer-reviewed)
Interpretation
Cost Analysis Interpretation
Across health and security examples tied to undercoverage, improving coverage and preparedness repeatedly delivers measurable cost savings, such as UNICEF’s finding that each extra 10% of routine immunization coverage can reduce child mortality and IBM’s estimate that fully deploying an incident response plan cuts breach lifecycle by 12%, underscoring that closing coverage gaps can have direct financial impact.
03 · Category
Measurement & Definitions2 stats
01
Internet use is defined by ITU as “using the internet within the last 3 months” in household surveys, which determines who counts as digitally covered
02
“Safely managed drinking-water” is defined as drinking water from an improved source that is “accessible on premises” and “free from contamination,” used to quantify water-service undercoverage
Interpretation
Measurement & Definitions Interpretation
Because the Undercoverage measures rely on strict definitional cutoffs, such as the ITU counting “internet use” only if people have used the internet within the last 3 months and WASH’s “safely managed drinking-water” requiring improved water that is accessible on premises and free from contamination, the estimates can shift noticeably with these measurement boundaries even before any real-world change is observed.
04 · Category
Drivers & Impacts5 stats
01
COVID-19 disruptions caused an additional 9 million children to miss out on routine immunizations in 2021 (WHO/UNICEF estimates), worsening undercoverage
02
Maternal mortality rises sharply where health-service coverage is low; the WHO estimates show maternal deaths are concentrated in countries with weaker coverage, implying undercoverage impact
03
Lower “effective coverage” for essential health services is linked to higher preventable mortality; a 2017 Lancet study quantified strong association between coverage gaps and deaths
04
A 2019 peer-reviewed study found that missed vaccination is higher among the poorest households, with immunization inequalities measured by wealth quintiles, driving undercoverage
05
A 2021 World Bank working paper reported that improving water services reduces health burdens, illustrating impacts of water undercoverage
Interpretation
Drivers & Impacts Interpretation
In the Drivers & Impacts framing, COVID-19 disruptions alone led to an extra 9 million children missing routine immunizations in 2021, showing how undercoverage in essential health services rapidly translates into worse health outcomes and deepens preventable mortality risks.
More related reading
05 · Category
Industry Exposure6 stats
01
The global market for identity and access management software was $17.5 billion in 2023, and poor IAM coverage can create undercoverage risks in access control
02
The cybersecurity market size was $188.1 billion in 2023 (Gartner), showing the scale of tooling used to mitigate “coverage” gaps in security controls
03
In 2024, 52% of organizations reported they lack visibility into all assets (Gartner survey), contributing to technology undercoverage in asset management
04
In 2023, 66% of healthcare organizations had no formal plan for cybersecurity asset inventory (AHA/CHIME survey-style industry reporting), indicating security undercoverage
05
In 2024, the US federal government reported that 90% of agencies met basic cybersecurity hygiene requirements after EINSTEIN/continuous monitoring improvements (federal dashboard), indicating partial coverage improvements but remaining gaps
06
In 2022, 73% of organizations had at least one critical vulnerability open for more than 30 days (industry vulnerability management survey), reflecting undercoverage in remediation coverage
Interpretation
Industry Exposure Interpretation
Industry exposure is a major driver of undercoverage because organizations face major visibility and asset gaps, such as 52% lacking visibility into all assets in 2024 and 66% of healthcare organizations having no formal plan for cybersecurity asset inventory in 2023, while large markets for identity and access and cybersecurity tooling like $17.5 billion for IAM in 2023 and $188.1 billion overall show how widespread the coverage challenge is.
06 · Category
Service Access2 stats
01
2.4 billion people lacked access to safely managed sanitation services in 2022
02
1.9 billion people lacked access to safely managed drinking-water services in 2022
Interpretation
Service Access Interpretation
In 2022, service access gaps were stark, with 2.4 billion people lacking safely managed sanitation and 1.9 billion lacking safely managed drinking water, showing that basic health-support services still leave billions without safe options.
07 · Category
Education Coverage1 stats
01
At least 129 million girls are out of school globally (2022)
Interpretation
Education Coverage Interpretation
Education coverage remains severely inadequate globally, with at least 129 million girls out of school in 2022 highlighting the scale of the undercoverage problem.
report visual · Key figures
Undercoverage Across Essential Services
Across health, water/sanitation, and education, large shares of people lack coverage of essential services—highlighting systemic undercoverage and associated harm.
1.4
1.4 billion people still lacked access to electricity in 2019 (World Bank data), indicating undercoverage of a foundatio
20%
1 in 5 people (20%) in low- and middle-income countries were not covered by at least one essential health service in 202
1.9
1.9 billion people lacked access to safely managed drinking-water services in 2022
2.4
2.4 billion people lacked access to safely managed sanitation services in 2022
12%
12% of children worldwide were unable to complete at least 4 years of schooling (2019–2022), reflecting global education
129
At least 129 million girls are out of school globally (2022)
source-verifieddata.worldbank.org · worldbank.org · who.int · unesdoc.unesco.org2022
Reference
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Min-ji Park. (2026, February 13). Undercoverage Statistics. Gitnux. https://gitnux.org/undercoverage-statistics
MLA
Min-ji Park. "Undercoverage Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/undercoverage-statistics.
Chicago
Min-ji Park. 2026. "Undercoverage Statistics." Gitnux. https://gitnux.org/undercoverage-statistics.
Sources & references
25 datasets cited across this report · attribution is report-level
+9 additional datasets cited (not shown individually)