Six lessons human health can learn from animal vaccination programmes
From rabies control to rinderpest eradication, animal health programmes offer lessons on early vaccination and surveillance that human health systems can use to better prevent disease.
- 7 April 2026
- 6 min read
- by Priya Joi
At a glance
- Around 75% of emerging infectious diseases in humans originate in animals.
- Animal health programmes often prioritise prevention before outbreaks reach people.
- Evidence from vaccination, surveillance and eradication efforts shows how upstream action can reduce human risk.
Around three quarters of emerging infections in humans originate in animals.
This reality is driving the evolution of how animal health systems operate, with vaccinating livestock, controlling disease reservoirs and monitoring animal populations becoming increasingly central to preventing infections and outbreaks from happening.
Today, on World Health Day, under the theme “Together for health. Stand with science”, there is a renewed focus on how collaboration across sectors can better protect human health. Where human health systems often scale up in response to outbreaks, animal health programmes are typically designed to prevent spillover before it happens.
Here are six ways in which approaches to animal disease control could help inform human health programmes.
1. Simplifying vaccine delivery
Rabies programmes show how simplifying delivery can make vaccination far more efficient. Oral rabies vaccines can be delivered in edible bait, allowing free-roaming dogs to be vaccinated without needing to be caught or injected.
A study in PLOS Neglected Tropical Diseases found this approach to be safe, even in cases of accidental human exposure.
Oral vaccination has already been used to eliminate rabies in wildlife in parts of Europe and North America, and is now being adapted for dogs in endemic settings.
Of course, there are important differences between mass vaccinating people and animals. Even large-scale efforts like COVID-19 vaccination showed how complex delivery and uptake can be.
However, some of the challenges in ensuring people are vaccinated to protect themselves from outbreaks aren’t to do with hesitancy, but instead because of challenges in access.
What rabies programmes show is how powerful it can be to design for coverage and simplicity from the start.
2. Eradication is possible with sustained vaccination and coordination
Rinderpest, a viral disease affecting cattle, offers one of the clearest examples of what sustained vaccination and coordination can achieve.
Closely related to the measles virus, rinderpest affected cattle as well as mammals like water buffalo, deer and giraffes. Outbreaks could be catastrophic, with death rates as high as 100% in cattle.
Eradication efforts began with the development of a vaccine in the early 20th Century, and in 1994 the Global Rinderpest Eradication Programme convened to finish the job, bringing together countries across Africa, Asia and the Middle East, and combining mass vaccination campaigns with strong surveillance and coordinated cross-border action.
Have you read?
The last case was recorded in 2001 and it was formally declared eradicated in 2011 – only the second disease after smallpox to have been eradicated by humans.
Achieving eradication was far from straightforward. Programmes had to reach remote and mobile pastoralist populations, operate in conflict-affected regions and maintain political commitment over decades.
Yet the strategy remained consistent: vaccinate widely, monitor closely and coordinate across borders.
The lesson is not just that eradication is possible, but that it depends on long-term investment, shared goals and systems designed to operate across countries rather than within them.
3. Surveillance in animals can provide earlier outbreak warnings
Animal health systems often detect disease threats before they appear in humans, offering a valuable early warning function.
Rift Valley fever is one example. In East Africa, outbreaks have been predicted using satellite data on rainfall and vegetation alongside livestock surveillance, allowing health authorities to anticipate risk and prepare vaccination campaigns in advance.
Similarly, surveillance of avian influenza in poultry and wild birds provides early signals of emerging strains with pandemic potential, often before human cases are detected.
These surveillance systems are designed to track changes in animal populations and environmental conditions, rather than waiting for clinical cases to appear in humans.
This shows the value of integrating environmental and animal data into surveillance systems, enabling earlier action and more targeted responses.
4. Designing for scale can improve coverage
Livestock vaccination campaigns are routinely designed to reach large populations quickly, often in settings where infrastructure is limited.
In South America, coordinated foot-and-mouth disease programmes have vaccinated hundreds of millions of cattle each year, contributing to regional control and, in some areas, elimination.
These campaigns rely on mobile teams, simplified logistics and coordinated delivery across regions, prioritising coverage over complexity.
Rather than focusing on individual-level care, they are built to reach as many animals as possible in a short period. Designing systems for speed and coverage from the outset can make large-scale vaccination more feasible and more effective.
5. Vaccination targets should actively shape how programmes are delivered
Both human and animal health programmes use vaccination targets. But in animal health, these targets are often tightly embedded in how programmes are designed and implemented.
For instance, in rabies control, vaccinating around 70% of dogs is widely recognised as sufficient to interrupt transmission. This threshold directly shapes how campaigns are planned, where resources are deployed and how success is measured.
More broadly, livestock vaccination programmes are often driven by immediate, measurable outcomes such as preventing economic loss or protecting food production. This creates a strong link between targets and delivery, helping programmes stay focused on achieving coverage quickly and efficiently.
Animal vaccines can also move more quickly from development to deployment, with different regulatory and evaluation pathways, allowing programmes to set targets and act on them faster.
Human health programmes also set ambitious targets, but these do not always translate as directly into delivery strategies on the ground. The lesson is to design programmes where targets are operational, shaping how vaccination is delivered, not just what is being aimed for.
6. Acting on environmental and seasonal risk can improve timing of interventions
Animal health programmes often plan vaccination around predictable seasonal patterns, rather than waiting for outbreaks to emerge.
Anthrax, a soil-borne disease affecting livestock and people, provides a clear example. Outbreaks frequently coincide with rainfall and temperature changes that bring spores to the surface and increase animal exposure.
In West Africa, modelling work by the FAO found that vaccination campaigns are often timed before the rainy season to ensure immunity is established before conditions favour transmission. Because of this, vaccination efforts can anticipate rather than react to disease risk, protecting herds before spore exposure peaks.
This allows programmes to act in advance, targeting interventions to when risk is highest rather than responding once disease is already spreading.
In human health, responses are more often triggered once outbreaks are detected, even when diseases follow predictable seasonal or environmental patterns.
What animal health programmes show is how effective it can be to align vaccination and preparedness with when risk is highest, not just where disease has already appeared.
Upstream interventions are most effective
Taken together, these examples point to a consistent theme: prevention works best when it happens early, at scale and with systems designed for coverage rather than response.
Animal health programmes have long operated this way, focusing on population-level protection and upstream action.
For human health systems facing increasingly complex infectious disease threats, these principles offer a useful starting point for thinking differently about prevention.
