Most parents know the little vaccine booklet from well-child visits. For many families, those shots feel almost automatic, something you check off the list. But globally, that routine is becoming anything but reliable.
About 13.5 million infants worldwide received no vaccine at all in 2025. That figure comes from the latest WHO and UNICEF immunization estimates, released in July 2026.
The number dropped by roughly 750,000 from 2024, a modest improvement. But it still sits well above the global 2030 goal of halving zero-dose numbers.
The broader context is in the WHO's World Health Statistics 2026 report. It warns that global health progress is fragile and insufficient.
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Childhood vaccination coverage remains below target, and immunity gaps are already contributing to outbreaks.
Why coverage below 95 percent lets measles through
Measles is one of the most contagious diseases known. According to the CDC, it takes about 95 percent coverage with both doses of the measles vaccine to prevent outbreaks.
In 2025, only 84 percent of children worldwide got the first measles shot. Just 77 percent got the second.
That gap matters. WHO and UNICEF report that 57 countries saw large or disruptive measles outbreaks in 2025.
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In the United States, measles has already killed an adult for the first time in 2026.
Herd immunity is not an abstract idea
When enough people are protected, a virus runs out of hosts and fades before it reaches a newborn or a cancer patient. When coverage drops, those are the people who lose protection first.
The CDC notes that measles crosses borders easily. One infected person can trigger a dozen more cases in any community where fewer than 95 percent of people are vaccinated.
What is driving the slide
WHO ties much of the pressure to money. In its November 2025 guidance on health financing cuts, the agency reported that funding reductions had slashed critical services by up to 70 percent in some countries.
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The hardest-hit areas include vaccination, maternal care and disease surveillance.
The data were collected in March 2025 from 108 low and middle income countries. External health aid is expected to fall by 30 to 40 percent in 2025 compared with 2023.
What parents can check at home
Many US pediatric offices store vaccination records in a patient portal, where parents can see which shots their child has received and when. State immunization information systems hold the same records and can send a copy on request.
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This article is made and published by Aksel Kryhlmand, who may have used AI in the preparation.