The first vaccine dose is reaching more children. The next appointment is still losing too many of them.
In 2025, 90% of infants worldwide, nearly 116 million, received at least one dose of the standard diphtheria, tetanus and pertussis vaccine. Eighty-five percent, or about 110 million, completed all three doses. Both rates improved by one percentage point. The five-point gap between the first and third dose is the warning light.
Coverage improved, but the system remains below 2019
The annual estimates compiled from 195 countries show progress after pandemic-era disruption. First-dose and three-dose coverage each rose. Yet global coverage remains one percentage point below 2019 and has moved within a narrow range since 2009.
That long plateau changes the interpretation. A one-point annual gain is welcome, but it is not a breakthrough. The world has recovered part of what it lost and has not solved the persistent access problems that existed before the pandemic.
Vaccination is a chain of ordinary actions: supply arrives, a clinic opens, a caregiver receives information, a child reaches the site, a record is created, and the next visit happens on time. The global percentage is the combined result of every link. Weakness at any one can break the schedule.
The first dose proves contact. Completion proves the health system can keep its promise.
The zero-dose number fell
An estimated 13.5 million children received no routine vaccine in their first year of life in 2025. That was nearly 750,000 fewer than the year before. Reaching those children is usually the hardest task because many live far from routine services or amid conflict, displacement and poverty.
The decline shows that outreach can work. Mobile teams, community health workers, reliable supplies and trusted local communication can find families missed by fixed clinics. It also shows why averages should not erase absolute numbers. A fractional improvement still represents hundreds of thousands of children gaining protection.
More than half of zero-dose children live in fragile, conflict-affected or vulnerable settings, although those settings contain about one-third of the world’s child population. The imbalance is not explained by attitudes alone. Clinics may be damaged, roads unsafe, staff unpaid and records lost.
Describing every missed dose as “hesitancy” can therefore misdiagnose the problem. A parent cannot accept a vaccine that never reaches the district.
Drop-out is the next operational emergency
Globally, 7.3 million infants received their first diphtheria-tetanus-pertussis dose but dropped out before the first measles dose. These children were not invisible to the system. They made contact and then lost the connection.
That makes drop-out both troubling and actionable. The health service often has a name, location or clinic record. Reminder systems, follow-up visits, flexible hours and integrated appointments can bring families back. The task is different from finding a child who has never appeared in any register.
Reasons vary. A caregiver may not know that several doses are required. Travel may be costly. A clinic may run out of stock. A child may be ill on the appointment date with no easy rescheduling. Families displaced by conflict may cross district or national borders and leave their records behind.
The correct intervention depends on the reason. A publicity campaign cannot fix an empty refrigerator. More supply cannot fix a clinic that opens only when caregivers are working. Good coverage programmes diagnose the missed connection before prescribing a solution.
Measles exposes the consequence
First-dose measles coverage stood at 84%, while second-dose coverage was 77%. Both are far below the 95% level needed to prevent outbreaks of a virus that spreads with exceptional ease. Fifty-seven countries reported large or disruptive measles outbreaks in 2025.
This is why a national average that sounds respectable may still be unsafe. Measles exploits clusters. A country can report high overall coverage while a particular district, religious community, displaced population or urban settlement remains far below the threshold.
Outbreak prevention requires local maps, not only national charts. Health teams need timely data by district and age. They also need rapid campaigns when cases appear. Waiting for an annual global estimate is like reading last year’s weather report after the storm has landed.
Progress and decline can happen in neighbouring rows
One hundred countries have maintained at least 90% coverage with three doses of the standard vaccine since 2019. Among countries below 90% in 2019, 30 improved over six years, while 65 stagnated or fell behind. Thirteen of those were fragile or conflict-affected.
Country movements can be dramatic. Sudan increased first-dose coverage by 35 percentage points and first-dose measles coverage by 22 points in one year, despite conflict. Syria lost 6 points on the first standard dose and 12 on the first measles dose. These shifts show how quickly access can change.
They also warn against cultural stereotypes. Countries in conflict are not destined to fail, and wealthy countries are not protected from decline. Operations, trust, funding and political commitment matter everywhere.
Access and confidence are separate gates
In lower-income or crisis settings, physical access and programme funding often dominate. In middle- and high-income countries, vaccines may be available while confidence weakens. South Africa’s first-dose coverage has fallen 20 percentage points since 2019. Bosnia and Herzegovina saw a 23-point drop in first-dose measles coverage after a large gain the previous year.
Trust cannot be rebuilt through ridicule. Families need clear answers about benefits, side effects and schedule. Health workers need time and training to hold those conversations. Public authorities must communicate uncertainty honestly and correct errors visibly.
At the same time, confidence should not become a convenient explanation for every failure. If booking systems are difficult, clinics are distant or appointments repeatedly lack stock, the institution is teaching people not to rely on it.
The cold chain is only one part of reliability
Vaccines must be stored and transported within specified temperatures. Refrigeration, monitoring and backup power are essential. Yet a perfect cold chain ends at a clinic door. Staff scheduling, transport for families, safe injection practice and record quality determine whether the dose reaches an arm.
Supply planning must account for multi-dose vials, wastage, seasonal travel and campaign demand. Too little stock causes missed appointments. Too much can expire. Local teams need usable forecasts rather than a national shipment total.
Maintenance is easy to overlook. A donated refrigerator without parts or trained technicians can fail silently. Programmes should budget for repair, calibration and replacement from the start.
Data systems are losing capacity
Only 18 national immunisation surveys were undertaken and submitted in the latest round, down from 50 in 2024 and an average of 33 a year between 2015 and 2019. Weakening measurement makes missed children harder to find.
Administrative records are useful, but denominators can be wrong when populations move or births are under-registered. Surveys provide an independent check. If survey coverage declines, apparent precision in national percentages may hide larger uncertainty.
Funding cuts to data systems can look harmless because they do not immediately reduce a shipment. Their effect arrives later: stale population estimates, unnoticed district gaps and slower outbreak response. The instrument panel goes dark before the engine stops.
Follow-up should be designed, not hoped for
A completion system begins at the first visit. Caregivers should leave knowing which dose comes next and when. Records should be portable. Reminders should use channels families actually access. Missed appointments should trigger respectful outreach.
Services can be combined. A vaccination visit may include growth monitoring or other child health support. Outreach can align with market days, schools or community events. The objective is to reduce the number of separate journeys a caregiver must make.
Digital tools can help, but only if records are accurate and privacy is protected. A text message to an old number is not follow-up. A national database that cannot exchange information with a local clinic is not continuity.
Financing must value routine work
Outbreak campaigns attract attention and emergency funding. Routine immunisation is quieter. Its success is measured by events that do not occur. That makes stable budgets harder to defend and more important to protect.
Over 25 years, sustained investment reduced the annual number of zero-dose children by 40%. That achievement came from governments, communities, health workers and international partners maintaining systems year after year. It cannot be preserved through occasional campaigns alone.
Funding should cover workers, transport, refrigeration, records, supervision and communication, not just vaccine purchase. A vial in a central warehouse is inventory. Protection begins only after delivery and completion.
The right dashboard has two numbers
Records must move when families move
Displaced families often cross districts or borders between doses. Paper cards can be lost, damaged or written in another language. A receiving clinic may repeat a dose unnecessarily or delay protection while trying to reconstruct the schedule.
Portable records can reduce that gap. They do not require one giant global database. A standard minimum record, readable across systems and available in both paper and secure digital form, may be enough. The design should work when connectivity fails and should collect no more personal data than the service needs.
Identity requirements deserve care. A child should not lose access because a birth certificate is missing or immigration status is uncertain. Public-health protection depends on reaching the population that is present, not only the population with perfect documents.
Cross-border coordination can also improve stock planning and outbreak response. Health authorities need aggregate information about movement without turning vaccination into immigration enforcement. If families fear that a clinic visit will expose them to punishment, the record system defeats its own purpose.
Continuity is practical trust. When a caregiver can arrive in a new place, show the prior dose and receive the next one without accusation or delay, the health system becomes worth returning to.
First-dose coverage shows reach. Completion and measles coverage show continuity. A programme that improves the first while losing children later should not declare full success. A programme with good completion among registered families must still find those never registered.
The 2025 data offer real progress: 750,000 fewer zero-dose children, 90% first-dose coverage and 85% three-dose coverage. They also show 13.5 million children entirely missed, 7.3 million lost after starting, and measles coverage too low to prevent outbreaks.
Managers should review these groups separately every month. Zero-dose children require outreach into communities the routine service has not reached. Drop-outs require follow-up after a known contact. Measles gaps require rapid local action because transmission does not wait for the annual report. One programme can serve all three, but one undifferentiated target will not explain where it is failing.
Coverage improves when ordinary visits happen reliably, not when heroic campaigns repeatedly repair a routine service allowed to weaken between emergencies.
The next breakthrough will not come from celebrating the first appointment; it will come from building a service reliable enough that families can complete the journey.